Bs-10, is-6392, is-1538, ansi-b-16.5, bs-1560, bs-4504, din-nd-10, nd-16, nd-25, nd-40, nd-100, jis awwa specifications and also as per customers drawings , 1/4" (6mm) n.B. To 72" (1800 / mild steel, is 2062, galvanised, carbon steel-a-105, gr.L or ii. Astm-181, is-1875, Gr, ii or iii, stainless steel 304, 316, 304l, 316l etc
