... Used for low pressure liquid delivery, such as water, gas, and oil.piling, etc. Standard:API 5L,API ... coating,Black Oil coating as per customers requirement Test:Chemical Component Analysis,Mechanical Properties(Utimate Tensile Strength, ... ),Technical Properties(Flattening Test,Bending Test,Blow Test,Impact Test),Exterior Size Inspection,Hydrostatic Test.,X-ray test Mill Test Certificate:EN10204/3. ...