... Trading Co., Ltd offers independent lab test reports for our Spiral steel pipes when required. Test reports are from a well-known, certified ... D,SS400,S235JR,S235JO,S235J2Q215-Q345, 20#, St37, St44, St52, ASTM A53, ASTM A106,x42-x70,L175-L55,etcStandardAPI 5L, API 5CT ... , ASTM A53, ASTM A252, EN10217, DIN 2458. IS 3589, IS1978 ,GB/T3091, GB/T9711,BS 1387UsageUsed for low pressure liquid ...