Seamless steel pipe API 5L X42 steel pipe used in liquid transportation, gas transportation and structural engineering

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Tianjin Sanon Steel Pipe Co., Ltd. is a stockist. Our stock factory is in Cangzhou City, Hebei Province. Our main sources of goods are boiler pipes, and the representative materials are ASTM A335 P5/P11/P91/P92, ASME SA-106/SA-106M GR.B, GB/T 3087-2008 10#/20#. The representative materials of pipeline pipes are API 5L, API 5CT, the representative materials of petroleum cracking pipes GB/T 9948 are 15MoG/12CrMoVG. GB/T 6479-2013 represents the material 10#/20#, heat exchanger tubes SA179/SA210/SA192, etc., mechanical tubes GB/T 8162 represent the material 10#/20#/Q345/42CrMo, EN10210 represents the material S355JOH/S355J2H, gas cylinder tubes GB1 8248, represent the material 34CrMo4/30CrMo.

Line pipe: It is to transport the oil, gas or water extracted from the ground to the oil and gas industry enterprises through the line pipe. Line pipes include seamless and welded pipes. The pipe ends are flat ends, threaded ends and socket ends; the connection methods are end welding, coupling connection, socket connection, etc.

Chinese name Line pipe Line pipe specification 10.3-2032×1.7-39.7mm Implementation standard GB/T9711-2017/API SPEC 5L Use Gas, water and oil transportation in the natural gas industry

Overview of line pipe
Use: Used for gas, water and oil transportation in the oil and gas industry

API SPEC 5L-2018 (Line pipe specification) is compiled and published by the American Petroleum Institute and is commonly used around the world.

According to the different performance requirements of GB/T9711-2017 pipeline steel pipes, tempering can be divided into the following types according to the tempering temperature:
1. Low temperature tempering (150-250 degrees)
The structure obtained by low temperature tempering is tempered martensite. Its purpose is to reduce the quenching internal stress and brittleness of the quenched steel while maintaining the high hardness and high wear resistance of the quenched steel, so as to avoid cracking or premature damage during use. It is mainly used for various high-carbon cutting tools, measuring tools, GB/T9711 pipeline steel pipes, rolling bearings and carburized parts, etc. The hardness after tempering is generally HRC58-64.
2. Medium temperature tempering (250-500 degrees)
The structure obtained by medium temperature tempering is tempered troostite. Its purpose is to obtain high yield strength, elastic limit and high toughness. Therefore, it is mainly used for the treatment of various GB/T9711 pipeline steel pipes and hot working molds, and the hardness after tempering is generally HRC35-50.
3. High temperature tempering (500-650 degrees)
The structure obtained by high temperature tempering is tempered troostite. The heat treatment combining quenching and high temperature tempering is usually called quenching and tempering treatment, the purpose of which is to obtain comprehensive mechanical properties with good strength, hardness, plasticity and toughness. Therefore, it is widely used in important structural parts of automobiles, GB/T9711 pipeline steel pipes, machine tools, etc., such as connecting rods, bolts, gears and shafts. The hardness after tempering is generally HB200-330.
The main production grades of pipeline pipes (API5L/GB/T 9711-2017):
1. PSL1: A/A210, B/L245, X42/L290, X46/L320, X52/L360, X56/L390, X60/L415, X65/L450, X70/L485, X80/L555
2. PSL2: BN/L245N, X42N/L290N, X46N/L320N, X52N/L360N, X56N/L390N, X60N/L415N, X65Q/L450Q, X70Q/L485 Q, X80Q/L555Q, X42Q/L290Q, X46Q/L320Q, X52Q/L360Q, X56Q/L390Q, X60Q/L415Q, X65Q/L450Q, X70Q/L485Q, X80Q/L555Q, X90Q/L625Q, X100Q/L690Q

3. Acid pipeline material: BNS/L245NS, X42NS/L290NS, X46NS/L320NS, X52NS/L360NS, X56NS/L390NS, X60NS /L415NS, X65QS/L450QS, X70QS/L485SQ, X80QS/L555QS, X42QS/L290QS, X46QS/L320QS, X52QS/L360QS, X56QS/L390QS, X60QS/L415QS, X65QS/L450QS, X70QS/L485QS
4. Acid/Still Service Line Pipe Material: BNO/L245NO, X42NO/L290NO, X46NO/L320NO, X52NO/L360NO, X56NO/L390NO, X60NO/L415NO, X65QO/L450QO, X70QO/L485QO, X80QO/L555QO, X42QO/L290QO, X46QO/L320QO, X52QO/L360QO, X56QO/L390QO, X60QO/L415QO, X65QO/L450QO, X70QO/L485QO, X80QO/L555QO, X90QO/L625QO, X100QO/L690QO

Note: There are many letters added after the API 5L standard pipeline steel grade, which represent the following:
What does pipeline steel grade N mean? “N” stands for normalizing heat treatment
What does pipeline steel grade Q mean? “Q” stands for quenching + tempering heat treatment
What does pipeline steel grade NS mean? “NS” stands for normalizing and acid and corrosion resistance,
What does pipeline steel grade QS mean? “QS” stands for quenching + tempering heat treatment and acid and corrosion resistance