| Seamless Steel Tube Standard
ASME SA-53、ASTM-A53、DIN 17121、 JIS G3444、GB/T8162-1999 GRADE A、B St37.0、St52.0、STK30、STK41、STK50、10,20,35, 45, Q345 Seamless steel tubes for structure purposes For general structure and mechanical structure, and also for ordinary uses in steam, water gas、and air lines
GB3087-1999 10,20 Seamless steel tubes for low and medium pressure boiler For various structural low and medium pressure boiler, high-temperature steam tubes and boiling-water tubes
ISO 559、GB/T8163-1999 St360、St410、St430、10、20、Q345 Seamless steel tubes for liquid service For hydraulic pillar
QJ/LB01.05-92 27SiMn Seamless steel tubes for hydraulic pillar GB/T17396-99
DIN 17175、 GB5310-1995 ST45.8/III、20G Seamless steel tubes for elevated temperatures Quality carbon steel and alloy steel seamless tubes for high pressure boiler
GB9948-1988 10 20 Seamless steel tubes for petroleum cracking Furnace tubes heat exchanger tubes and pipeline used in petroleum refinery
GB6479-1986 10,20G,Q345 etc High-pressure seamless steel tubes for chemical fertilizer equipment Quality carbon steel and alloy steel seamless tubes for chemical equipment and pipelome
API SPEC 5L A、B、X42 Line pipe For liquid service
API SPEC 5CT J55 、N80 class Casing tubing and drill pipe (plain or beveled bare pipe ) For petroleum recovering
ASME SA-106 ASTM-A106 GRADE A、B、C Seamless carbon steel tubes for High-Temperature service For making equipments such as high pressure boilers etc
JIS G3429 STH38、STH55 Seamless tubes for high pressure GAS cylinder For high pressure gas cylinder
DIN 1629 St37.0 、 St44.0 、St52.0 Seamless circular tubes of non-alloy steels with special quality
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