August 19, 2022

Differences between the characteristics of different grades of alloy steel pipes, and application cases

Differences between the characteristics of different grades of alloy steel pipes, and application cases 12CrlMoV This steel has the characteristics of creep limit and lasting strength values are similar, in the long-term stretch, it has high plasticity, its oxidation resistance and thermal strength are higher than 2CrMoV, and the workmanship and weldability are good (preheating before welding, post-welding heat treatment to eliminate stress), generally used after normalizing and high temperature tempering Used to manufacture superheated steel pipes, conduits, radiator tubes and related forgings in high-pressure equipment with working temperatures not exceeding 570 ~ 585 °C 25Cr2MoVA medium carbon heat-resistant steel, […]
August 12, 2022

A691Gr2-1 / 4CrCL22 high temperature and high pressure steel pipe

First, SA691Gr2-1/4CrCL22 is mainly used as welded pipe for power equipment A691 grade is mainly used for high temperature and high pressure carbon steel and alloy steel point melt welded steel nominal pipe Second, SA691 is a high temperature and high pressure reconsideration condition with electric fusion welding steel and alloy steel standards, the grade of steel pipe reaches SA691Gr2-1/4Cr, to go through the effect force treatment, radiographic inspection and water pressure test. SA691Gr2-1/4CrCL22 is a kind of CR-MO heat-resistant steel, the basic components are 2.25% CR, 1% MO. Equivalent to the seamless tube SA-335P22, Maigang A691 is used as […]
August 12, 2022

Introduction to A335 P91 Alloy Pipe- 10Cr9Mo1VNb

A335 refers to the executive standard: ASTM A335 seamless ferritic alloy steel pipe for high temperature P91 is a material in the ASTM A335 standard: I. Introduction to 10Cr9Mo1VNb: 10Cr9Mo1VNb is equivalent to T91 or P91 and implements the standard ASTM A213 ASTM A335. 10Cr9Mo1VNb not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness and high and stable durability plasticity and thermal strength. When the use temperature is lower than 620 °C, 10Cr9Mo1VNb uses a higher stress than austenitic stainless steel. Above 550 °C, the recommended design uses stresses approximately twice […]
July 15, 2022

Quality requirements for seamless steel pipes

(1) Quality requirements ①Chemical composition of steel: The chemical composition of steel is one of the most important factors affecting the performance of seamless steel pipes, and it is also the main basis for formulating process parameters for rolling and heat treatment of steel pipes. Alloying elements: intentionally added, according to application Residual elements: brought into steelmaking, properly controlled Hazardous elements: strictly controlled (As, Sn, Sb, Bi, Pb), gases (N, H, O) Out-of-furnace refining or electroslag remelting: improve the uniformity of the chemical composition in the steel and the purity of the steel, reduce the non-metallic inclusions in the billet […]
July 9, 2022

erw ,roll bending pipes,sprial pipes,different manufacturing processes

pdf downloads: welded pipes different manufacturing processes MAJOR PODUCTION USAGE: The manufacturing process of different welded pipes,Comparison table of steel pipe manufacturing standard grades in different countries. pdf  downloads:02.Comparison table of steel pipe manufacturing standard grades in different countries    
July 5, 2022

Classification, production process and mechanical properties of seamless steel pipes

According to different production methods, it is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, pipe jacking, etc., all of which have their own process regulations. The materials are ordinary and high-quality carbon structural steel (Q215-A~Q275-A and 10~50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc. According to the use, it is divided into two categories: general use (for water, gas pipelines and structural parts, mechanical parts) and special (for boilers, geological exploration, bearings, acid resistance, etc.). Seamless steel pipes are widely used. General-purpose seamless steel pipes are rolled from ordinary carbon structural […]
June 29, 2022

gas piping system Installation Inspection

Natural gas pipe mainly contains a gas mixture called methane. Natural gas is formed by chemical changes in the remains of plants and animals that existed millions of years ago and remains deep in the Earth’s crust over time under the influence of heat and pressure. Natural gas pipe is usually found in oil-bearing or non-oil-bearing reservoirs. Today, natural gas is used as an important energy source for heating homes and workplaces, and given the risks posed by natural gas, gas piping system installation inspections by authorised agencies are important in this regard. Natural gas installations are used for residential heating, […]
June 29, 2022

Piping System Inspection

The Plumbing Systems segment includes plumbing and drainage installations, air conditioning and heating installations, fire and security alarm installations, lighting systems and many other construction works. Looking at this sector as a whole, the following four basic sub-sectors can be seen: Plumbing Services: Covers general plumbing services, including water supply to a building, installation of sewers, and drainage and gas systems. Fire and Security Alarm Installation Services: It includes security systems as well as fire protection, detection and control systems. Electrical installation services: Covers cables or connecting equipment. This includes maintenance and repairs to existing electrical equipment and fixtures. Air Conditioning […]
June 29, 2022

API 5L Pipeline Inspection and Testing

The API 5L standard and specification, developed by the American Petroleum Institute (API), covers oil, gas, and water pipelines in the oil, gas, and water distribution industries. The full name of the standard is as follows: API 5L Pipe Inspection and Testing.   According to this standard, pipes are classified according to the following criteria: Application: Seamless or Welded (Seamless pipe can be used up to 24 inches, LSAW can be used up to 24 inches, ERW can be used up to 20 inches) Specification level: API PSL1 is the standard quality for piping, API PSL2 sets more stringent chemical, mechanical […]
June 29, 2022

API 1104 Sources of Piping and Related Facilities

The API 1104 standard, developed by the American Petroleum Institute (API), is the industry standard for welding applications. This standard provides a method for producing high-quality welds in a novel and understandable format using qualified welders, approved welding procedures, materials and equipment. The full name of the standard is as follows: API 1104 Welding of Piping and Related Facilities. This standard contains detailed and multi-year industry information and provides inspection methods to authorized organizations to ensure accurate analysis of weld quality using qualified technicians and approved methods and equipment. The API 1104 standard covers gas and arc welding of low alloy steel […]