Quality :Grade A Certificate:ISO9001:2000 Material: carbon stee ,stainless steel ,forged carbon ... Spiral Steel Pipe 4. Material: Carbon Steel: ASTM A106 Gr. B, ASTM A53, Gr. B, ASTM A105, ASTM A234 Line Pipe: API ... , X60, X65, X70, X80 5. Standard: ASME/ANSI, ASTM, DIN, JIS, BS, EN, GB, API 6. Productive Technology ... as requirement 12. Payment: 1) 30% T/T in advance, the balance by T/T after seeing the ...