SSAW (Spiral Submerged-arc Welded) Quality standard: API 5L , ASTM A252 , BS EN10025, BS EN10219, ... pressure liquid delivery, such as water, oil, gas. structure pipe, piling pipe Outside coating: Anti-rust oil, black painting. Epoxy Coating ... , Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps. Test: Chemical Component Analysis, Mechanical Properties ( ...