a. Alloy Steel Pipes : ASTM A 335 Gr.P-5, P-9, P-11, P-22, P-91 Etc with IBR Cert.
b. Alloy Steel Tubes : ASTM A 213 T-11, T-22 etc., with IBR Certificate.
c. Carbon Steel Pipes : ASTM A106/API 5L Gr. B with IBR Certificate .
d. Seamless boiler tubes : BS 3059 Part.II G...