01 China Round Structure Steel Pipe - Spiral welded pipes/helical welded pipes ...
Spiral welded pipes/helical welded pipes No. Item Description 1 Standard API 5L psl1/psl2, ISO3183, DIN2458, ASTM A139, A252, EN10219/EN10217,KS F4602, KS D3583 etc. 2 Sizes 8" to 138" 3 Thickness 4mm to 25.4mm 4 NDT Test UT, RT, hydrosta...