January 4, 2019

Casing pipe application in high-temperature gas wells

In recent years, with the decreasing number of easily exploitable oil and gas wells, it has become necessary for oil and gas wells to go deeper on both underground and underwater. And, tubing and casing strings are subjected to higher temperature and higher pressure in these wells, which would probably cause casing failure or gas leakage in the high-pressure/high-temperature (HPHT) wells. Hence, more attention has been paid to wellbore integrity in oil and gas industry in recent years.1,2 The key factor of wellbore integrity is casing string connections, which are expected to provide both structural and leakage integrity under severe environment. […]
December 29, 2018

API 5L Grade-B ERW Line Pipe Technical Specifications , 20″DN (508.0 mm)×WT 7.9 mm

Schedule of Requirements IFT NO. PD.2312/397-MECD/MEZ/PIPE.Materials: Line Pipe. Item No. Description of Goods Qnty Unit A. Line Pipe. As per detailed technical specifications at Section 7. Size and quantity are as follows:     A.1 DN 20″ x WT 7.9 mm API 5L Grade B, ERW 450 Meter. A.2 DN 16″ x WT 7.9 mm API 5L Grade B, ERW 5,600 Meter. Technical Specifications       IFT NO. PD.2312/397-MECD/MEZ/PIPE. API 5L Grade-B ERW Line Pipe 20″DN (508.0 mm)×WT 7.9 mm This Specification covers the manufacturer, acceptance and delivery of steel pipes with Electric Resistance Welded Longitudinal seam for gas line pipe. Said […]
December 5, 2018

Asia’s steel trade faces multiple challenges

Weak domestic demand and trade friction are important challenges that the development of the steel industry faces at present, and the abuse of trade protection measures is bringing about adverse impacts in many aspects. For the development of China’s steel market, Xia Xiaokun, who is vice president of Shanghai Mysteel Research Institute. He said, this year, the environmental restricting output normalized steel production fell year-on-year, then the strong toughness of China’s Economic ensure the smooth running of domestic steel consumption. And the whole of China’s iron and steel spot market prices is running at a high state, while the profits […]
September 27, 2018

Seamless Steel Pipe for vessels, equipment, fittings and mechanical structures

GB/T8162 – China National Standard  ASTM  A53 – American Society for Testing and Materials Standard ASME SA53 – American Boiler and Pressure Vessel Code Uses: for the manufacture of seamless pipes for pipes, containers, equipment, pipe fittings and mechanical structures Mainly produced steel pipe grades: 10, 20, 35, 45, Q345, 15CrMo, 12Cr1MoV, A53A, A53B, SA53A, SA53B, etc. Dimensional tolerances: Steel pipe type Outer diameter (D) Steel pipe wall thickness (S) Cold drawn tube Steel pipe outer diameter (mm) Allowable deviation (mm) Steel pipe wall thickness (mm) Allowable deviation (mm) >30~50 ±0.3 ≤30 ±10% >50~219 ±0.8% Hot rolled tube >219 ±1.0% >20 ±10%   Mechanical […]
September 12, 2018

Protective coating for petroleum pipe

Protective coating for petroleum pipe and preparation method and construction method thereof   [57] Abstract The invention provides a protective coating for oil pipes and wellheads and downhole equipment used in oil and gas drilling, oil recovery and transportation. The protective coating comprises, by weight percentage, 55 to 95% of polyphenylene sulfide, 3 to 30% of adhesion enhancer, and 1 to 20% of abrasion resistant enhancer. A surface wettability converting agent may also be included in the range of 1 to 15%. It can prevent or reduce the high temperature, high pressure, high hydrogen sulfide and carbon dioxide, high salt content and other strong […]
August 17, 2018

What is the difference between pipe vs tube?

What is the difference between pipe vs tube? A pipe is a round tubular to transport or distribute fluids and gases. Steel pipes are designated by a nominal size value (NPS or DN), which represent a rough indication of their inside diameter and fluid conveyance capacity. A tube is a round, rectangular, squared or oval hollow section measured by outside diameter (“OD”) and wall thickness (“WT”), expressed in inches or millimeters.  Pipes are used for conveying fluids and gases; tubes are used to manufacturing pressure equipment (tubing) and for mechanical applications. PIPE INSIDE DIAMETER The word “steel pipe” refers to round […]
August 3, 2018
api gas pipeline

What are the risks of natural gas pipeline construction?

Abstract: The construction of long-distance transportation natural gas pipeline system is to achieve the purpose of long-distance pipeline transportation of natural gas, so that users along the line can obtain the required gas volume to meet the needs of users.       The construction of long-distance transportation natural gas pipeline system is to achieve the purpose of long-distance pipeline transportation of natural gas, so that users along the line can obtain the required gas volume to meet the needs of users. The procedures for pipeline construction are complicated. Long-distance pipeline systems are generally buried pipelines. Pipe trenches need to be dug. For […]
June 16, 2018

Difference Between SCH 40 and SCH 80 Steel pipe

“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 […]