... seamless steel tube1: 201, TP304, 304L, 316L, TP316L, 316Ti, 317, 317L, 321 etc. 2. Technical standinox tubeards: 1)ASTM A312/A312M ASTM A213/A213M ASTM ... 6-630mm, Wall Thickness: 1-40mm. Cold rolled pipes: OD19-159mm, Wall Thickness: 1-10mm Notes: According to customers' ... products have got all the Certificates below: A. ISO9001: 2000 b, Any Third Party testing are accepted In order to ensure ...