Welding Technology : 
1)LSAW-Longitudinal Submerged-arc Welded Steel Pipes / tubes
2)JCOE Welded Steel Pipes

Out Diameter: ERW 21.3mm~168mm ; LSAW 219mm~1422.4mm
Wall Thickness:2.5mm~100mm
Length:2m~12m

Material:API 5L GR B,ASTM A106 GR A/B/C,ASTM A53 GR A/B, A210, A252, 
A333;API 5L PSL1 PSL2 X42, X46, X52, X60, X65, X70; 20#, 20G,Q345, Q235,
16Mn,L245~L555; JIS STPG42,G3454, G3456; St37, St42, St45, St52, DIN 1626, 
DIN 17175 etc.

Standard:ASTM /ASME B36.10M, API 5L, JIS, DIN 17175,DIN17100,DIN1626, BS1387,BS6323,BS10210,BS3602,EN10217,EN10219,AS1163,AS1074,
GOST 10704-91, GOST 10705-80, GOST 10706-76,GB/T etc.