abter steel pipe manufacturer, natural gas casing and tubing,seamless steel pipe,OCTG, http://www.abtersteel.com OCTG pipe,carbon steel pipe,seamless steel pipe ,erw pipe Sat, 16 Jun 2018 03:48:36 +0000 en-US hourly 1 Difference Between SCH 40 and SCH 80 Steel pipe http://www.abtersteel.com/knowledge/difference-between-sch-40-and-sch-80-steel-pipe/ Sat, 16 Jun 2018 03:48:36 +0000 http://www.abtersteel.com/?p=4257 “Schedule 40” and “Schedule 80” refer to the thickness of the walls of pipes. “Schedule” is the standard of wall thickness that has been adopted by the American National Standards Institute. As per the Institute, the thickness of wall pipes varies from Schedule 10, Schedule 40, Schedule 80, and Schedule 160. Pipes with Schedule 40 come with standard weight, and pipes with schedule 80 come with extra strength. The materials used for making Schedule 40 and Schedule 80 come from the same material. Schedule 80 pipes have a thicker wall than Schedule 40 pipes. As such, Schedule 80 pipes are […]

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“Schedule 40” and “Schedule 80” refer to the thickness of the walls of pipes. “Schedule” is the standard of wall thickness that has been adopted by the American National Standards Institute. As per the Institute, the thickness of wall pipes varies from Schedule 10, Schedule 40, Schedule 80, and Schedule 160.

Pipes with Schedule 40 come with standard weight, and pipes with schedule 80 come with extra strength. The materials used for making Schedule 40 and Schedule 80 come from the same material.

Schedule 80 pipes have a thicker wall than Schedule 40 pipes. As such, Schedule 80 pipes are stronger than Schedule 40 pipes. Though both pipes are used in construction work, Schedule 40 is used more often. But if a stronger pipe was needed, then the engineers would go for Schedule 80 pipes. Schedule 80 pipes are used where the pipes have to be exposed. But if there is no need for any extra strength, Schedule 40 pipes are sufficient.

Steel Pipe Schedule Chart ANSI B36.10 & 36.19 (Unit in Inch)

Steel Pipe Dimensions Chart (Size Chart)

Steel Pipe Dimensions Chart (Size Chart)

Schedule 40 and Schedule 80 pipes are also different in their cost. As Schedule 80 pipes consist of more materials, the price is considerably higher than Schedule 40 pipes. Schedule 80 pipes are also more costly as the cost of production is greater.

When comparing the weight, Schedule 40 pipes come in less weight than Schedule 80 pipes. As such, Schedule 40 pipes are easier to install than Schedule 80 pipes.

If there is a need for a high water temperature or high-pressure pipe, Schedule 80 is the best as it can withstand a greater pressure and temperature than Schedule 40 pipes.

What is Steel Pipe Dimensions Schedule?

Steel pipe schedule is a indicating method represented by ASME B 36.10, and also used in many other standards, marked with “Sch”. Sch is the abbreviation of schedule, generally appearing in the American steel pipe standard, which is a prefix of a series number. For example, Sch 80, 80 is a pipe number from chart/table ASME B 36.10.

“Since the steel pipe main application is to transport the fluids under pressure, so their internal diameter is their critical size. This critical size is taken as nominal bore (NB). Therefore, if steel pipe carry the fluids with pressure, it is very important that pipe shall have enough strength and enough wall thickness. So wall thickness is specified in Schedules, which means the pipe schedule, abbreviated as SCH. Here ASME is the given standard and definition for the pipe schedule.”

The pipe schedule formula:

Sch.=P/[ó]t×1000
P is the Designed pressure, units in MPa;
[ó]t is Allowable stress of materials under design temperature, Units in MPa.

What does SCH mean for the steel pipe dimensions

As describing the steel pipe parameter, we usually use the pipe schedule, It is a method that represent pipe wall thickness with number. Pipe schedule ( sch. ) is not a wall thickness, but a wall thickness series. Different pipe schedule means different wall thickness for the steel pipe in the same diameter. The most frequently indications of schedule are SCH 5, 5S, 10, 10S, 20, 20S, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160. The larger the table number, the thicker the surface pipe wall, the higher the pressure resistance.

Schedule 40, 80 steel pipe dimension means

If you are new in pipe industry, why you always see a schedule 40 or 80 steel pipe everywhere? What kind of material for these pipes?

As you have read above articles you know that Schedule 40 or 80 represent a pipe wall thickness, but why it always been searched by buyers?

Here is the reason:

Schedule 40 and 80 steel pipe as the common sizes that required in different industries, because of the generally pressure these pipes bear, they are always been asked for a large quantity.

The material standard for such thickness pipes has no limitations, you could ask sch 40 stainless steel pipe, like ASTM A312 Grade 316L; Or sch 40 carbon steel pipe, such as API 5L, ASTM A53, ASTM A106B, A 179, A252, A333 etc..

Summary:

Pipes with Schedule 40 come with a standard weight, and pipes with Schedule 80 come with extra strength.
Schedule 80 pipes are stronger than Schedule 40 pipes.
Though both pipes are used in construction work, Schedule 40 is used more often.
Schedule 80 pipes are used where the pipes have to be exposed. But if there is no need for any extra strength, Schedule 40 pipes are sufficient.
When comparing the weight, Schedule 40 pipes come in less weight than Schedule 80 pipes.
As Schedule 80 pipes consist of more materials, the price is considerably higher than Schedule 40 pipes.
If there is a need for a high water temperature or high-pressure pipe, Schedule 80 is the best as it can withstand a greater pressure and temperature than Schedule 40 pipes.

 

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The difference between ERW steel pipe and spiral steel pipe http://www.abtersteel.com/knowledge/the-difference-between-erw-steel-pipe-and-spiral-steel-pipe/ Sun, 03 Jun 2018 03:10:50 +0000 http://www.abtersteel.com/?p=4252 Steel pipes can be seen everywhere in our daily life. It is widely used in heating, water supply, oil and gas and other industrial liquids, which brings great convenience to our life and production. According to the tube forming technology, steel tubes can be roughly divided into the following four categories: seamless steel tubes, high-frequency welded tubes, LSAW tubes, and spiral submerged arc welded tubes. According to the form of the weld we can be divided into seamless steel pipe, ERW steel pipe and spiral steel pipe. We have made a corresponding comparison of ERW steel pipes and spiral steel […]

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Steel pipes can be seen everywhere in our daily life. It is widely used in heating, water supply, oil and gas and other industrial liquids, which brings great convenience to our life and production. According to the tube forming technology, steel tubes can be roughly divided into the following four categories: seamless steel tubes, high-frequency welded tubes, LSAW tubes, and spiral submerged arc welded tubes. According to the form of the weld we can be divided into seamless steel pipe, ERW steel pipe and spiral steel pipe. We have made a corresponding comparison of ERW steel pipes and spiral steel pipes in terms of different forms of welds.

1, production process
ERW steel pipe is a Spiral steel pipe. Usually divided into metric welded steel pipe, welded thin-walled pipe, transformer cooling oil pipe and so on. The ERW welded pipe has a simple production process, high production efficiency, low cost, and rapid development. Spiral steel pipe is a coiled steel pipe made from strip coils as the raw material, which is often warm extruded and welded by an automatic double wire double-sided submerged arc welding process.
The strength of the spiral welded pipe is generally higher than that of the ERW welded pipe. A narrower blank can be used to produce a larger diameter pipe, and a blank having a different diameter can be produced from a blank of the same width. During the forming process, the steel plate is uniformly deformed, the residual stress is small, and the surface is free of scratches. The processed spiral steel pipe has greater flexibility in the range of diameters and wall thicknesses, especially in the production of high-grade thick-walled pipes, especially small- and medium-caliber thick-walled pipes, which have unparalleled advantages over other technologies and can satisfy users. More requirements on the specifications of spiral steel pipe. The use of advanced double-sided submerged arc welding technology can achieve welding in the best position. It is not prone to defects such as misalignment, welding deviation and incomplete penetration, and it is easy to control the welding quality. However, compared with the ERW pipe of the same length, the length of the weld seam increases by 30 to 100%, and the production speed is low.

2, security analysis
ERW steel pipe is mainly subjected to residual stress caused by inhomogeneous cooling. Residual stress is the stress of internal self-phase equilibrium under no external force. Hot rolled section steel of various sections has such residual stress. The larger the section size of general steel, the residual The stress is also greater. Although the residual stress is self-balanced, it still has certain influence on the performance of steel components under external forces. For example, it may have adverse effects on deformation, stability, and fatigue resistance; after welding, The non-metallic inclusions inside the ERW steel pipe are pressed into thin slices, and the delamination phenomenon occurs. The delamination weakens the performance of the ERW steel pipe in the thickness direction, and there is a possibility of interlayer tearing when the weld seam shrinks. The local strain induced by weld shrinkage often reaches several times of the yield point strain, which is much larger than the strain caused by the load. In addition, the ERW welded pipe will inevitably have many T-welds, so the probability of welding defects is also greatly improved. Moreover, the welding residual stress at the T-weld is large, and the weld metal is often in a three-dimensional stress state, increasing the possibility of cracking.
Spiral submerged arc welded pipe spiral weld distribution, long weld, especially in the dynamic conditions of welding, the weld is too late to leave the molding point of cooling, easy to produce welding hot cracks. The direction of the crack is parallel to the weld and is at a certain angle to the axis of the steel tube, typically between 30-70°. This angle is just in line with the shear failure angle, so its bending, tensile, compressive and torsional resistance is far inferior to the LSAW pipe. At the same time, due to the limitation of the welding position, the resulting saddle shape and ridge-shaped welding seam influence Beautiful. In addition, during the construction process, the intersecting line welds at the spiral welded parent pipe joints split the spiral joints and generate larger welding stress, which greatly weakens the safety performance of the components. Therefore, the non-destructive testing of the spiral welded pipe joints should be strengthened. Ensure welding quality, otherwise spiral submerged arc welded pipe should not be used in important steel structure occasions.

3, the scope of application
LSAW pipe adopts double-side submerged arc welding process. Welding under static conditions, the quality of the weld is high, the weld is short, and the probability of defects is very small. The steel pipe expands through full-length, has a good pipe shape, and is precise in size. The steel pipe has a wide wall thickness range and a wide range of pipe diameters. It is suitable for supporting columns, ultra-large span building structures, such as buildings, bridges, dams, and offshore platforms, as well as wind-resistant and earthquake-resistant structures. Pole mast structure. Spiral steel pipe is a kind of steel commonly used in industry, construction and other industries. Mainly used in tap water projects, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction.

In summary, we can see that the two different types of welded seam pipes have their own characteristics and have different advantages according to different applications.

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Large diameter welded pipe main production process description: http://www.abtersteel.com/equipment/large-diameter-welded-pipe-main-production-process-description/ Sun, 03 Jun 2018 03:06:14 +0000 http://www.abtersteel.com/?p=4234 1. Prospecting: After the steel plate used for manufacturing large-diameter submerged arc welded straight seam steel pipes enters the production line, a full-plate ultrasonic inspection is first performed; 2. Milling: Double-sided milling of the two edges of the steel plate by the edge milling machine to achieve the required plate width, plate edge parallelism and groove shape; 3. Pre-crimping: Pre-bending machine is used to pre-bend the edge so that the edge of the board has a curvature that meets the requirements; 4. Forming: In the JCO molding machine, first half of the pre-bent steel plate is punched several times and […]

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1. Prospecting: After the steel plate used for manufacturing large-diameter submerged arc welded straight seam steel pipes enters the production line, a full-plate ultrasonic inspection is first performed;
2. Milling: Double-sided milling of the two edges of the steel plate by the edge milling machine to achieve the required plate width, plate edge parallelism and groove shape;
3. Pre-crimping: Pre-bending machine is used to pre-bend the edge so that the edge of the board has a curvature that meets the requirements;
4. Forming: In the JCO molding machine, first half of the pre-bent steel plate is punched several times and pressed into a “J” shape. Then, the other half of the steel plate is also bent and pressed into a “C” shape to form an opening. The “O” shape
5. Pre-welding: seaming the formed straight welded steel pipe and using gas shielded welding (MAG) for continuous welding;
6. Internal welding: Use vertical multi-wire submerged arc welding (up to four wires) to weld inside the straight seam steel pipe;
7. Outer welding: use vertical multi-wire submerged arc welding to weld outside LSAW steel pipe;
8. Ultrasonic inspection I: 100% inspection of the internal and external welds of the longitudinal welded steel pipe and the base metal on both sides of the weld;
9. X-ray inspection I: 100% X-ray industrial television inspection of internal and external welds, using image processing systems to ensure detection sensitivity;
10. Expanding: Expand the length of the submerged arc straight seam steel pipe to increase the dimensional accuracy of the steel pipe and improve the distribution of the internal stress of the steel pipe.
11. Hydraulic pressure test: The root diameter of the expanded steel pipe is tested on the hydrostatic testing machine to ensure that the pipe meets the required test pressure. The machine has automatic recording and storage functions;
12. Chamfering: the pipe after passing the inspection is processed at the pipe end to meet the required pipe end groove size;
13. Ultrasonic inspection II: Ultrasonic inspections are performed one by one to check for possible defects in the longitudinal welded steel pipe after diameter expansion and water pressure.
14. X-ray examination II: X-ray industrial television inspection and tube-end weld seam inspection of steel pipes after diameter expansion and hydrostatic pressure testing;
15. Tube end magnetic particle inspection: This inspection is performed to find the tube end defects;
16. Anti-corrosion and coating: The qualified steel pipe is anti-corrosion and coating according to the user’s requirements.

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Structure Pipe http://www.abtersteel.com/seamless-steel-pipe/structures-steel-pipe/structure-pipe/ Sun, 03 Jun 2018 02:57:30 +0000 http://www.abtersteel.com/?p=4242 Structural Pipes Relying on advanced cold rolling and hot rolling production equipment and good production capacity, our seamless steel pipes have good mechanical properties, qualified chemical composition, and perfect appearance. Pipeline pipe is widely used in oil and gas transportation, such as pipelines, high pressure pipelines, low temperature pipelines, boilers, alloys, structures and chemical fields.    Product Description Standard: ASTM A53, ASTM 106, EN10210, EN10216 Grade: A106, A53, S235JR, P235GH Size: Outside diameter: 1/2”-24”/DN15-DN600, 21.3 mm – 610 mm Wall thickness: 2 mm – 50 mm, SCH20 – SCH160 Length: 6 m-12 m Quality assurance Many years of experience in […]

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Structural Pipes
Relying on advanced cold rolling and hot rolling production equipment and good production capacity, our seamless steel pipes have good mechanical properties, qualified chemical composition, and perfect appearance. Pipeline pipe is widely used in oil and gas transportation, such as pipelines, high pressure pipelines, low temperature pipelines, boilers, alloys, structures and chemical fields.
Structural Pipes Structural Pipes  
Product Description
Standard: ASTM A53, ASTM 106, EN10210, EN10216
Grade: A106, A53, S235JR, P235GH
Size:
Outside diameter: 1/2”-24”/DN15-DN600, 21.3 mm – 610 mm
Wall thickness: 2 mm – 50 mm, SCH20 – SCH160
Length: 6 m-12 m
Quality assurance
Many years of experience in the production of seamless tubes and ERW/HFW steel tubes, advanced production equipment, good technology, perfect testing capabilities, ISO9001 , 14001, 18001 , etc. Management system certificate.
1. Inquiry Evaluation The
production technology department will evaluate the technical parameters of each inquiry. We guarantee that all technical parameters can meet customer requirements and related standards. We will do our best to meet customer needs.
2. On-line production supervision In
order to meet the contract requirements and technical specifications, our on-line production supervision covers all aspects, and the supervision involves various aspects such as raw material inspection, process evaluation, internal quality control, inspection catalog, identification, and packaging.
3. Final inspection
of products The products are tested according to domestic and foreign standards, including physical performance testing, chemical analysis, non-destructive testing, reliability testing and packaging inspection.
4. Logistics monitoring
Monitoring packaging, storage, bundling, loading and other logistics end.

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APL 5L ASTM A 106 carbon steel seamless pipe http://www.abtersteel.com/seamless-steel-pipe/apl-5l-astm-a-106-carbon-steel-seamless-pipe/ http://www.abtersteel.com/seamless-steel-pipe/apl-5l-astm-a-106-carbon-steel-seamless-pipe/#respond Wed, 23 May 2018 15:27:52 +0000 http://www.abtersteel.com/?p=4217 We are professional manufacturer of carbon steel seamless pipe, which have been approved by API and ISO systerm. 1. OD: 1/2″ to 24″ W. T: 3mm-40mm ( SCH 20 to SCH 180) 2. Standard: ASTM A 106/ APL 5L 3. Surface: Oil-coating, varnish, or end-protection by plastic caps to be confirmed 4. Packing: In hexagonal shape bundles wrapped with strong steel trip 2MT/bundle. 5. Application: Oil&gas, chemical, electric industial and ship contruction, water transportation 6. Operation principle: Superior Quality, Competitive Price, Best Services. CHEMICAL SOMPOSITION (CAST ANALYSIS)  MECHANICAL PROPERTIES Qulity Control   Packaging & Shipping    

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We are professional manufacturer of carbon steel seamless pipe, which have been approved by API and ISO systerm.

1. OD: 1/2″ to 24″ W. T: 3mm-40mm ( SCH 20 to SCH 180)

2. Standard: ASTM A 106/ APL 5L

3. Surface: Oil-coating, varnish, or end-protection by plastic caps to be confirmed

4. Packing: In hexagonal shape bundles wrapped with strong steel trip 2MT/bundle.

5. Application: Oil&gas, chemical, electric industial and ship contruction, water transportation

6. Operation principle: Superior Quality, Competitive Price, Best Services.

api 5l astm a106 pipe

CHEMICAL SOMPOSITION (CAST ANALYSIS) 

MECHANICAL PROPERTIES

Qulity Control

 pipe Qulity Control

Packaging & Shipping

Packaging & Shipping

 

 

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Steel Pipe With Heat Insulation | polyurethane thermal insulation steel pipe http://www.abtersteel.com/coated-steel-pipe/polyurethane-thermal-insulation-steel-pipe/ http://www.abtersteel.com/coated-steel-pipe/polyurethane-thermal-insulation-steel-pipe/#respond Wed, 23 May 2018 15:16:21 +0000 http://www.abtersteel.com/?p=4210 Insulation steel pipes are widely used in liquid and gas transmission pipe networks, chemical pipe insulation projects in petroleum, chemical, central heating and heating networks, central air-conditioning ventilation pipes, and municipal engineering. High-temperature prefabricated direct-buried thermal Insulation steel pipe is a direct-buried prefabricated thermal Insulation steel pipe with good thermal insulation performance, safety and reliability, and low construction cost. Specification 1.The pre-insulated steel pipe coated with high density polyurethane foam can resistant the temperature up to 140°c. 2.With the corrosion resistant hdpe jacket pipe can make the pipe directly buried underground without trench. 3.Different size pipe and pipe fittings can […]

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Insulation steel pipes are widely used in liquid and gas transmission pipe networks, chemical pipe insulation projects in petroleum, chemical, central heating and heating networks, central air-conditioning ventilation pipes, and municipal engineering. High-temperature prefabricated direct-buried thermal Insulation steel pipe is a direct-buried prefabricated thermal Insulation steel pipe with good thermal insulation performance, safety and reliability, and low construction cost.

Specification

1.The pre-insulated steel pipe coated with high density polyurethane foam can resistant the temperature up to 140°c.

2.With the corrosion resistant hdpe jacket pipe can make the pipe directly buried underground without trench.

3.Different size pipe and pipe fittings can service for different heating and cooling project.

4.The polyurethane foam thickness can be designed from 26.5-83mm or more.

Underground direct buried pre insulated polyurethane thermal insulation steel pipe

Underground direct buried pre insulated polyurethane thermal insulation steel pipe for hot water

 

Description polyurethane thermal insulation steel pipe
Wall Tickess 0.5mm-16mm
Length 1m-12m ,or by customer’s requirements
Production Standard  API 5L PSL1/ PSL2,ASTM A53,ASTM A252,GB/T9711.1,GB/T3091,SY/T 5037-2012,DIN1626,EN10219,EN10217
End 30~35°  Beveled end
Quality Control 100% X-Ray inspection
100%Hydraulic Pressure test
100% Ultrasonic inspection 
Internal lining Epoxy , cement motar,  and according to customers requirement 
Operating pressure <1.6Mpa
Laid way Buried, overhead, trench

Grade of the steel pipe 

and pipe fitting

20#/Q235 Seamless steel pipe and spiral steel pipe (GB and oil standard)
Insulation material

Fluoride-Free water foamed rigid polyurethane foam material 

(foam density: 60kg/m3-80kg/m3

Inner surface tension of the 

high density polyethylene pipe

≥50dy/cm
Product Description

polyurethane thermal insulation carbon steel pipepolyurethane thermal insulation carbon steel pipe fittings

 

Effectively solve the problem of insulation, sliding lubrication and water resistance of polyurethane thermal insulation steel pipe ends of prefabricated direct-buried thermal insulation tubes used for high temperature heat transmission from 130°C to 600°C (Steel Pipe With Heat Insulation) in central urban heating. High-temperature prefabricated direct-buried thermal polyurethane thermal insulation steel pipe not only have the advanced technology and practical performance that are difficult to compare with traditional trenches and overhead pipelines, but also have significant social and economic benefits, and are also powerful measures for heating and energy saving. High-temperature prefabricated direct-buried thermal Insulation steel pipe adopts direct-buried heating pipeline technology, which indicates that the technology development of China’s heating pipeline has entered a new starting point.

The polyurethane thermal insulation steel pipe is composed of a steel pipe, a glass fiber reinforced plastic inner sheath, and a glass fiber reinforced plastic outer shell. Its feature is that it also includes a high temperature insulation insulation layer, a lubricating layer, and an elastic seal. The utility model effectively solves the problem of heat preservation, sliding lubrication and waterproofness of the exposed tube end of a prefabricated direct-buried heat preservation tube used for high temperature heat transmission of 130°C-600°C in a concentrated urban heating system.

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 Black steel pipe Scaffolding Application http://www.abtersteel.com/coated-steel-pipe/galvanized-steel-pipe/black-steel-pipe-scaffolding-application/ http://www.abtersteel.com/coated-steel-pipe/galvanized-steel-pipe/black-steel-pipe-scaffolding-application/#respond Mon, 21 May 2018 14:12:12 +0000 http://www.abtersteel.com/?p=4206  Application of Black steel pipe Scaffolding   【Abstract】This paper discusses the application of scaffolding on site construction, describes in detail the calculation of the supporting system of the scaffolding, and compares the situation of two kinds of steel scaffolds commonly used in construction.  [Key Words] Fastener Black steel pipe ,Scaffolding Portal Black steel pipe ,Scaffolding Foundation Bearing Capacity    ·We have won a high reputation with the highest quality products. 1.Detail Information of building ERW black round steel welded pipe dn200 1) size : O.D 15–457mm   W.T 1–12mm Length: as you required. ( L < 12m ) 2) the chemical composition of […]

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 Application of Black steel pipe Scaffolding

  【Abstract】This paper discusses the application of scaffolding on site construction, describes in detail the calculation of the supporting system of the scaffolding, and compares the situation of two kinds of steel scaffolds commonly used in construction. 

[Key Words] Fastener Black steel pipe ,Scaffolding Portal Black steel pipe ,Scaffolding Foundation Bearing Capacity 

 

·We have won a high reputation with the highest quality products.

Black steel pipe for Scaffolding

1.Detail Information of building ERW black round steel welded pipe dn200

1) size : O.D 15–457mm   W.T 1–12mm Length: as you required. ( L < 12m )
2) the chemical composition of raw materials   the mechanical property of raw materials
item Chemical composition % Item mechanical property
steel C Mn S P Si   steel yield point Mpa tensile strength Mpa elongation %
BS1387 < 0.2 < 1.2 < 0.045 < 0.045 < 0.30   BS1387 > 195 325-460 20 (min)
A53 A 0.25 0.95 0.045 0.05   A53 A > 205 > 330 26–30
A53 B 0.3 1.2 0.045 0.05   A53 B > 240 > 415 21–26
A500 A D < 0.26 < 1.35 < 0.035 <0.035 0<0.30   A500 A D 230–250 310-400 22–26
A500 B C < 0.26 < 1.35 < 0.035 <0.035 0<0.30   A500 B C 315–345 400–425 21–22
S235 < 0.20 < 1.4 < 0.040 < 0.040 < 0.30   S235 > 235 > 425 21–22
S355 < 0.22 < 1.6 < 0.030 < 0.030 < 0.55   S355 > 355 470-630 21-22
C250 < 0.3 < 1.2 < 0.045 < 0.040 < 0.30   C250 250 320 25
C350 < 0.22 < 1.6 < 0.035 < 0.035 < 0.55   C350 350 430 22

3)quality standard: A53 | A252 | A572 | A450 A500 | A795|EN 39|BS1139|BS1387| BS6323|

BS10210 |EN10217| BS3602 |EN10219| DIN17100 |DIN1626 |GOST8731 |GOST10704|as1074 |as1163

4) surface treatment: galvanized steel pipe , oiled, painted , bare  

 
 
6) test:chemical component analysis, mechanical properties ,technical properties , exterior size inspection
7)application:transmission of gas .water .petroleum, fence.construction.mechanical part furniture making
8)certificate: SGS inspection
9)delivery time: usually in 20–30 days
10) payment term: T/T , L/C, Western Union
black steel pipe fittings carbon threaded metal rectangular steel tubeblack steel pipe fittings carbon threaded metal rectangular steel tubeblack steel pipe fittings carbon threaded metal rectangular steel tube

 

 2.Here we list the  size of  sch40 for your reference.

OD sch40 WT   OD sch40 WT   OD sch40 WT   OD sch40 WT   OD sch40 WT
1/2″ 2.77 1-1/4″ 3.56 2-1/2″ 5.16 4″ 6.02 8″ 8.18
3/4″ 2.87 1-1/2″ 3.68 3″ 5.49 5″ 6.55 10″ 9.27
1″ 3.38 2″ 3.91 3-1/2″ 5.74 6″ 7.11 12″ 10.31

other size for your reference

OD mm WT mm ` OD mm WT mm   OD mm WT mm   OD mm WT mm
21 1–2.75 73 2.5–7.0 121 2.5–7.0 168.3 2.75–12
25 1.7–3.25 76.1 2.5–7.0 127 2.75–11.0 177.8 2.75–12
33.4 1.9–4.0 88.9 2.8–8.0 133 3.25–8.0 194 2.75–12
42.2 2.0–4.0 98 2.5–4.5 139.7 2.5–10.0 203 3.0–12
48.3 2.0–7.0 102 2.5–9.0 152 3.25–7.5 219 2.75–12.0
57 2.3–5.0 108 2.8–9.0 159 2.5–10.0 244.5 4.0–12.0
60.3 2.0–7.0 114.3 2.5–9.0 165 2.75–7.0 273.1 4.0–12.0
We are the manufacturer of steel pipe.some size not listed here also can be produced. 
Fittings and flanges also can be supplied and welded. If you need more info , please feel
free to contact us ,we would send the info in time .

 

 

 Introduction
   
   In the construction of bridges, although the scaffolding has an important position in the project, it should be included in the unit construction organization design according to the construction design requirements, but now However, it is often found that there are no detailed descriptions of the construction organization design of many units; if they are, they are often very simple and do not meet the actual construction requirements. To ensure the safety of construction, it is necessary to verify the scaffolding. 
 
   In the current construction of bridges, there are two types of scaffolds that are used more frequently: one is a fastener-type steel tubular scaffold, and the other is a portal-type steel scaffold. This article mainly introduces the design and calculation methods of these two scaffolds. 

 
   Fastener type steel scaffolding 
  
   Fastener type steel tubular scaffold is a kind of Black steel pipe scaffold consisting of horizontal cross bar, longitudinal cross bar, vertical pole, scaffold board and scissors, sweeping pole, base, pull support and fasteners connecting them. 
   
   1. Fastener-style Black steel pipe scaffolding design 
  
   The fastener-type Black steel pipe scaffold used in bridge construction is generally used as a formwork frame to withstand the construction load of concrete structures. The load-carrying capacity of fastener-type steel tubular scaffolds is designed according to the requirements of the probabilistic limit state design method and the partial expression design formula. The general calculations are: the strength of the flexural members such as the longitudinal and horizontal horizontal bars and the anti-sliding bearing capacity of the connecting fasteners; the calculation of the stability of the poles; the calculation of the bearing capacity of the foundations of the poles. 
  
  (1) Load calculation 
 
   In the construction of bridges, the loads acting on the fastener-type steel scaffolds are generally the load of the construction structure, the weight of the operator, the gravity of the construction equipment and the self-gravity of the fastener-type Black steel pipe scaffold. The location and distribution of various loads can be used according to the actual situation. The order of delivery of the fastener-type steel scaffolding scaffolding is: scaffolding → transverse crossbars → longitudinal crossbars → poles → pedestals → foundations.
   
  (2) Calculation of bending strength of 
  
   vertical and horizontal horizontal bars The calculation formula of bending strength of vertical and horizontal horizontal bars is as follows: 

δ= ≤[f] 

m—— bending moment design value 

Horizontal and vertical horizontal bars have internal force generally in accordance with three spans. Continuous beam calculation of bending moment (if special circumstances can be calculated by the multi-span continuous beam bending moment): 

w – section modulus. 

[f] – Design value of bending strength of steel. 

  
   (3) Calculation of 
   vertical and horizontal horizontal bar disturbance :    Vertical and horizontal horizontal bar interference is calculated as follows: 
υ = ≤ [υ] 

υ – [r]

– e – elastic modulus of steel i – 

vertical and horizontal The moment of inertia of the section of the horizontal rod 

q—the equivalent uniform load on 

longitudinal and transverse horizontal rods—the length of horizontal and vertical horizontal rods 

[υ]—the allowable disturbances should be used in the following table. 

    
   (4) Anti-sliding bearing capacity of connecting fasteners When calculating 
   
   vertical and horizontal horizontal bars and vertical bars, the anti-sliding bearing capacity of fasteners shall comply with the following formula: 

r ≤ [r] 

r – vertical and horizontal horizontal bars Vertical force transmitted to vertical pole (q*l) 

[r]——Design value of anti-sliding bearing capacity of fasteners. 

    
   (5) Calculation 
    
   of the stability of the vertical pole Calculation of the stability of the vertical pole : 
 
≤[f] 
n——The axial force of the 

vertical pole calculated by the template bracket Design value n=1.2∑ngk+1.4 
∑nqk 
∑ngk——Template and bracket The sum of the self-weight, the self-weight of the newly poured concrete and the axial force generated by the self-weight of the steel bar.

∑nqk—The sum of the axial forces generated by the construction workers and the standard value of the construction equipment load and the load standard value generated when the concrete is vibrated. ф —— 

The stability factor of the axial compression member should be based on the slenderness ratio λ. 
When λ>250, ф=7320/λ2 

a—the sectional area of ​​the pole. 

[f] – Design value of bending strength of steel. 
 
   (6) Calculation of the bearing capacity of the foundation of the vertical pole 
  
   According to the test results, the curve of the stress at the bottom surface of the load plate and its subsidence is shown in the figure below. It can be seen from the figure that the deformation of the foundation soil under load. If the load stress exceeds p0, the bearing deformation of the foundation will mutate and lose the bearing capacity of the foundation. Therefore, the average pressure of the bottom surface of the pole must meet the following requirements: 

p ≤ [fg] 

p——the average pressure of the bottom of the foundation of the pole, [fg] —the 

design value of the foundation bearing capacity, the  

 
    portal steel scaffold 
  
   with the mast, The basic structure is composed of cross support, connecting rods, hanging buckle type scaffold boards or horizontal frames, locking arms, etc. A standardized Black steel pipe scaffolding is provided with horizontal reinforcing rods, scissors supports, sweeping rods, sealing rods, brackets and bases. 
 
   1. Design and Calculation 
  
   of Portal Steel Tubular Scaffolds The gate steel tubular scaffolds used in bridge construction are generally used as formwork supports to withstand the structural loads of concrete structures (see above). The carrying capacity of the scaffold also uses a unified design expression of the current structure. That is, the design method based on the probability limit state is also used.
  
   Different from fastener Black steel pipe scaffolding, the main failure mode of gantry steel scaffolding is the multi-wave buckling failure of the gantry plane with weak bending rigidity. Due to the basic unit of the gantry scaffold, the gantry is a frame structure. Under the action of the construction load, the gantry members of the construction layer are subjected to local bending moments in the plane of the gantry. Therefore, gantry steel scaffolds mainly transmit the vertical load to the foundation by the axial force of the vertical pole of the gantry. When the wind load acts, the bending moment will be generated in the plane direction of the gantry, which also depends on the vertical axis of the gantry. The heart formed a couple of moments to resist. In short, the portal Black steel pipe scaffold is mainly subject to axial pressure. Both calculations are mainly performed to evaluate the stability of portal steel scaffolds, and the formulas are as follows: n 

≤ [nd] 

n — axial force acting on a portal frame design value 

[nd] — design of a steady load capacity of a portal frame value. 
    
   2. The calculation of the bearing capacity of the portal steel tubular scaffold is the same as the calculation of the fastener steel tubular scaffold. 

p ≤ [fg] 

p——average pressure of the base of the foundation of the pole, 

[fg]——design value of the foundation bearing capacity,  
  
    through the above calculation of the stability of the scaffold and the bearing capacity of the foundation, the theory of safe construction of the scaffold supporting system has been obtained in accordance with. 

 
    Door-type scaffolding and fastener-type scaffolding comparison  
  
    1, construction process comparison: 
   
 Portal scaffolding: 1) easy assembly and disassembly, construction work efficiency; about 2 to 3 times the fastener-type scaffolding. 2) The relative strength of workers’ labor is relatively low. 
 
    Fastener type scaffolding: 1) It is more convenient to install and disassemble, and the construction efficiency is lower. 
 
    2, erect height comparison: 
   
   gate scaffolding: erect height is generally ≤ 45 meters. 
  
   Fastener Scaffolding: The erection height is generally ≤ 50 meters. 
 
   3. Comparison of Economic Benefits: 
 
   Portal Scaffolding: 1) Use less steel. 2) There are many types of specifications for scaffolds, and one-time investment is large. 3) Scaffolding is difficult to manage and difficult to maintain.
    Fastener type scaffold: 1) More steel is used. 2) Small one-time investment in scaffolding. 
   
   4. Civilized Construction Compared with 
   
   Portal Scaffolding: Scaffolding assembly is standardized, arranged neatly and beautifully. 
 
   Fastener Scaffold: Scaffolding assembly is acceptable. 

    
   Safety construction should pay special attention to the issue 
   
   during the use of scaffolding during the prohibition of dismantling cross-support, reinforcement rods, sweeping poles and so on. The construction load of the operation layer must meet the design requirements and must not be overloaded. 
  
   The site where steel scaffolding is erected must be flat and solid, and drainage work must be strictly performed. 

   Concluding remarks 
   
   Suburban Ring Line a30 Hujia Expressway Interchange Project mainly uses fastener Black steel pipe scaffolding. I calculated the strength of the flexural members such as the vertical and horizontal horizontal bars and the anti-sliding bearing force of the connecting fasteners; the calculation of the stability of the rods; the calculation of the bearing capacity of the rod foundation, and the overall stability of the scaffold, the safety adjustment factor, and the minimum scaffolding The repeated checking of the height of these items found that the scaffold erected by the construction unit was unreasonable and the amount of steel used in the Black steel pipe was excessive. This is due to the fact that the construction unit has not adopted calculations but has adopted the results of experience building. The final construction unit adopted his own calculation results, optimized the erection of scaffolding, and saved about 3% of steel consumption. Practice has proved that the scaffold erected after calculation is more scientific and standardized, which guarantees the safety and stability of the scaffold, saves construction costs, and achieves good results.

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Steel weight calculation formula http://www.abtersteel.com/knowledge/steel-weight-calculation-formula/ http://www.abtersteel.com/knowledge/steel-weight-calculation-formula/#respond Mon, 21 May 2018 13:58:49 +0000 http://www.abtersteel.com/?p=4203 Steel weight calculation formula  steel formula –steel weight calculation formula –mass calculated steel steel weight (kg) = 0.02466 × thickness × (outer diameter – wall thickness) × length  bar Weight (kg): Weight per meter = 0.00617 * diameter * diameter  rebar weight (kg) = 0.00617 × × diameter was calculated diameter × length (rebar and the same round)    square steel weight (kg) = 0.00785 × side edge width × length × width  angle weight (kg) = 0.00785 × (edge width edge width + – edge thickness) × length × thick side  plate weight (kg) = 7.85 × × thickness area  […]

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Steel weight calculation formula
 steel formula –steel weight calculation formula –mass calculated steel
steel weight (kg) = 0.02466 × thickness × (outer diameter – wall thickness) × length 

bar Weight (kg): Weight per meter = 0.00617 * diameter * diameter 
rebar weight (kg) = 0.00617 × × diameter was calculated diameter × length (rebar and the same round)   
square steel weight (kg) = 0.00785 × side edge width × length × width 
angle weight (kg) = 0.00785 × (edge width edge width + – edge thickness) × length × thick side 
plate weight (kg) = 7.85 × × thickness area 
flat weight (kg) = 0.00785 × thickness × width × length side 
copper plate weight (kg) = 0.0089 × length × width × thickness 
brass weight (kg) = 0.0085 × width × length × thickness 
aluminum weight (kg) = 0.00171 × width × length × thickness 
hexagonal weight (kg) = 0.0068 × width × pair of side edges width × length 
octagonal steel weight (kg) = 0.0065 × sides of the edge width × width × length of 
round copper rod weight (kg) = 0.00698 × diameter × length × diameter 
round brass rod weight (kg) = 0.00668 × diameter × diameter × length of 
round rod weight (kg) = 0.002 Diameter × 2 × D × L 
square copper rods weight (kg) = 0.0089 × side edge width × length × width 
square brass rod weight (kg) = 0.0085 × width × side edge width × length 
square rod weight (kg) = 0.0028 edge width × length × width × sides 
hexagonal copper rods weight (kg) = 0.0077 × sides of the edge width × width × length of
Brass rod weight (kg) = 0.00736 × edge width × length × width sides of 
the hexagonal rod weight (kg) = 0.00242 × sides of the edge width × width × length of 
round copper by weight (kg) = 0.028 × wall thick × (outer diameter – wall thickness) × length 
circular brass weight (kg) = 0.0267 × thickness × (outer diameter – wall thickness) × length 
circular tubes by weight (kg) = 0.00879 × thickness × (outer diameter – wall thickness) × length 

Note: the formula length in meters, the area in square meters, and the remaining units are mM

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Spiral steel pipe manufacturing process http://www.abtersteel.com/knowledge/spiral-steel-pipe-manufacturing-process/ http://www.abtersteel.com/knowledge/spiral-steel-pipe-manufacturing-process/#respond Wed, 16 May 2018 15:20:13 +0000 http://www.abtersteel.com/?p=4198 Spiral steel pipe production process and straight seam steel pipe is different: the strip coil as raw material, often warm extrusion molding, automatic double-wire double-sided submerged arc welding process welded spiral seam steel pipe. 1. Raw Material Inspection 2. Uncoiling 3. Rough Leveling  4. End Cutting and Butt Welding 5. Precision Leveling 6. Delivering 7. Forming By Inner and Outer Welding  8. Welding Slag Cleaning & Overall Inspection  9. repair Welding, X-Ray Inspection, Scanning, And Re-Inspection By Manual UT 10. Chamfering  11. Hydrostatic Testing 12. auto Length-Measuring and Weighing  13. Coating and Marking  14. storage       (1) Raw […]

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Spiral steel pipe production process and straight seam steel pipe is different: the strip coil as raw material, often warm extrusion molding, automatic double-wire double-sided submerged arc welding process welded spiral seam steel pipe.

1. Raw Material Inspection
2. Uncoiling
3. Rough Leveling 
4. End Cutting and Butt Welding
5. Precision Leveling
6. Delivering
7. Forming By Inner and Outer Welding 
8. Welding Slag Cleaning & Overall Inspection 
9. repair Welding, X-Ray Inspection, Scanning, And Re-Inspection By Manual UT
10. Chamfering 
11. Hydrostatic Testing
12. auto Length-Measuring and Weighing 
13. Coating and Marking 
14. storage

 

 

 

(1) Raw materials are steel coils, welding wire, and flux. Have to go through rigorous physical and chemical tests before investing.
 
(2) For the butt-end welding of steel strips, single-wire or double-wire submerged arc welding is used, and after the coils are made into steel pipes, automatic submerged arc welding is used to make up the welding.
 
(3) Before forming, the steel strip is leveled, trimmed, edged, surface cleaned and pre-flanged. (4) The electric contact pressure gauge is used to control the pressure of the compression cylinders on both sides of the conveyor to ensure the smooth delivery of the strip.
 
(5) External control or internal control roll forming.
 
(6) The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of misalignment, and the weld gap are all strictly controlled.
 
(7) The inner and outer welds are all welded by single-wire or double-wire submerged arc welding using the Lincoln Electric Welder of the United States, thereby obtaining a stable welding specification.
 
(8) Welded welds were all inspected by an online continuous ultrasonic automatic flaw tester to ensure non-destructive testing coverage of 100% spiral welds. If there are defects, they will be automatically alarmed and painted. The production workers will adjust the process parameters at any time to eliminate defects in time.
 
(9) Using an air plasma cutter to cut the steel pipe into single pieces.
 
(10) After cutting into a single steel pipe, a strict first inspection system shall be carried out for each of the first three pipes of each batch to inspect the mechanical properties, chemical composition, fusion condition, surface quality of steel pipes, and non-destructive testing to ensure the pipe-making process. Qualified before they can officially put into production.
 
(11) Where there is a continuous sound wave flaw detection mark on the weld, after manual ultrasonic and X-ray review, if there is a defect, after repair, it shall undergo a non-destructive test again until it is confirmed that the defect has been eliminated.
 
(12) The butt joints of the butt welds and the intersections with the spiral welds of the steel strip are all examined by X-ray television or film.
 
(13) Each pipe is hydrostatically tested and the pressure is radial sealed. The test pressure and time are strictly controlled by the steel pipe hydraulic pressure testing device. Test parameters are automatically printed and recorded.
 
(14) End-of-pipe machining is performed so that the verticality of the end face, the groove angle and the blunt edge are accurately controlled.

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What is the OD, inner diameter, nominal diameter of steel pipe? http://www.abtersteel.com/knowledge/what-is-the-od-inner-diameter-nominal-diameter-of-steel-pipe/ http://www.abtersteel.com/knowledge/what-is-the-od-inner-diameter-nominal-diameter-of-steel-pipe/#respond Wed, 16 May 2018 15:10:05 +0000 http://www.abtersteel.com/?p=4195 What is the outer diameter, inner diameter, nominal diameter of steel pipe?       The diameter of steel pipe can be divided into outer diameter, inner diameter and nominal diameter. The outer diameter of the pipe with the antiseptic spiral steel pipe is denoted by letter D, followed by the size and wall thickness of the outer diameter. For example, the anticorrosive spiral steel pipe with an outer diameter of 108 has a wall thickness of 5mm, which is expressed by D108*5. The plastic pipe is also expressed by the outer diameter, such as De63. Others such as reinforced concrete pipes, cast […]

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What is the outer diameter, inner diameter, nominal diameter of steel pipe?

      The diameter of steel pipe can be divided into outer diameter, inner diameter and nominal diameter.

The outer diameter of the pipe with the antiseptic spiral steel pipe is denoted by letter D, followed by the size and wall thickness of the outer diameter.

For example, the anticorrosive spiral steel pipe with an outer diameter of 108 has a wall thickness of 5mm, which is expressed by D108*5. The plastic pipe is also expressed by the outer diameter, such as De63. Others such as reinforced concrete pipes, cast iron pipes, and galvanized pipes are indicated by DN. Design drawings are generally expressed in terms of nominal diameters. The nominal diameter is a standard that is conveniently and artificially specified for design, manufacture and maintenance. It is also a nominal diameter and is the specification name of a pipe (or pipe fitting).

The nominal diameter of the pipe is not equal to its inner diameter and outer diameter.

For example: a nominal diameter of 100MM spiral steel postal mail 102 * 5, 108 * 5 several, 108 is the outer diameter of the pipe, 5 is the pipe wall thickness, therefore, the inner diameter of the pipe is (108 * 5-5) =98MM, but it is not exactly equal to the difference between the wall thickness and the wall thickness. It can also be said that the nominal diameter is a specification of a pipe diameter that is close to the inner diameter but does not equal the inner diameter. With nominal diameter, the purpose is to determine the pipe size, pipe fittings, valves, flanges, gaskets and other structural dimensions and connection dimensions according to the nominal diameter. The nominal diameter is denoted by the symbol DN. If the outside diameter is used in the design drawings, it should also be made. The pipe specification table shows the nominal diameter and wall thickness of a certain type of pipe.

 

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