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.