A213 A213/A213M-99a Specification for Seamless Ferritic andAustenitic Alloy-Steel Boiler, Superheater, and Heat-ExchangerTubes
ASTM A269/A269M Seamless ferritic and austenitic alloy-steelboiler, superheater, and heat-exchanger tubes
ASTM A312/A312M Seamless and welded, and heavily cold workedaustenitic stainless steel pipes

Tubes/ pipes material: TP304L, TP316L, TP316Ti, TP321,E235, E355, ST 37, ST52

DIN 2391, EN10305-1, EN10305-4

Mechanical tubes:DIN 1629: St37.0, St44.0, St52.0; GB/T8162:10#, 20#, 35#, 45#, Q345A, Q345B, Q345C, Q345D, Q345E; ASTM A53:ASTM A53 Grade A,ASTM A53 Grade B( Dowload: ASTM A53standard)

Cold drawn precision seamless steel tubes
1) Standard: DIN2391 DIN2393 GB/T3639 EN10305-1 EN10305-4
2) Grade: 10#  20#  35#  45#  ST37, ST45, ST52 E235 E345 .......
3) Sizes: O.D :6mm- 120mm; W.T:0.5~30.0mm
4)Delivery condition: Cold processing/hard (BK)???Coldprocessing/soft (BKW)
Relief annealing after cold processing (BKS)
Annealing (GBK)
Normalizing (NBK)

High-Pressure Seamless Steel Tube for Diesel Engine
steel tube in compressor pipelines