SSAW DSAW Spiral Welded Steel Pipes Production Technology: 1) SSAW Spirally Submerged-Arc Welded Steel pipes 2) DSAW Double Submerged-Arc Welded Steel Pipes Outside Diameter:219mm~3620mm Wall Thickness:5mm~26mm Length:2m~12m Standard:API 5LGr.B,API 5L PSL 1 PSL 2 X42,X46,X52,X60,X65,X70, X80 ,ASTM A252 Gr.2,Gr.3,ASTM A53 Gr.BSY/T 5037-2000; SY/T5040-2000; GB/T3091-2008: Q235B,Q345B,20#,16Mn;GB/T9711.1-1997; GB/T9711.2-1999: L245~L555;EN10217-1,EN10219-1,EN10224 L235,L275,L355;EN10025 etc. Material:API 5L GR B,Q235,Q345,L245,L290,L360,16Mn,X42,X46,X52,X60,X65, X70,X80,0Cr13,1Cr17,1Cr18Ni9,S235JR,S235JO,S235J2,S275JR,S355JR, S355JO,S355J2,S355K2; DIN 1629 ST37,ST42,ST52 etc