... 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 5L. GRB ,DIN, EN, GB ... pipe standard: API5CT, API5L, ASTM, JIS, DIN, GB , and so on.Material: Q235, ST52,ST42,A106 -a, A106-B , and so on Boiler seamless carbon steel tube