... tube, seamless steel tube ,seamless steel pipe,ASTM A106 seamless carbon steel pipe for high temperature service,seamless steel ... tube,seamless tube,seamless carbon steel tube, product informationMETERIAL:ASTM A106. GRB/A53. GRB/API ... pipe6. spiral steel pipe7. square steel pipe8. hot-galvanized steel pipe standard: API5CT, API5L, ASTM, JIS, DIN, GB , ...