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we main produce ERW LSAW SSAW seamless:HS code 73053100.
welded pipe:Q345 Q235 X80 X70 X60 X52 N80 L290 L360 SM490A AS-333 Gr.6 Gr.50 A106 Gr.B.according API 5L,PSL1 PSL2.
special material:SR235jr S235J2G3 DIN 17100 C22 SS400 STS49 STB42 JIS STKR400.
seamless pipe:Gr.B 20# 35# 45# X42 X52 AISI-1010/1034/1045.
Special material:Gr.A S335JR L245 L490 SD390 XC10 CK22 27SiMn A178A A179C A214C A210A A226 A315B ASTM-A500 A707 A808M E234B E235C SS41 G3452 SD390 RB400 etc
oil casing:J55 K55 N80 L80 P110 C90 C95 T95 P110 Q125,sucker rod high precision pipe,BTC LTC STC EUE.
russia standard:Gost 9940 /9941-81/8732/8734/1050/ Grade-20 S45 S48 S20C.
according API 5CT 5L ,DNV,include FBE 2PE 3PE 2PP 3PP.NACE MR0175