API 5L seamless pipe CARBON STEEL:Astm a 53/106/ API 5LA ... or Cold Rolled Size:1/2"-24" API 5L seamless pipeMaterial:1. CARBON STEEL: Astm a 53/106/ ... API 5LA/B,ST37,ST35.82. Standard: Seamless – ASTM A106, API 5L, ASTM A179, , ASTM A53, ... products are widely used in oil & gas, fertilizer, petroleum, boiler, power station, shipping military, chemical industry, environment protection, traffic, ...