1.Seamless and Welded Cap 2.Manufacturing Standard ASME B16.9 MSS SP75 3. ... (DN 15 to DN 2000) ·Type Seamless and Welded Cap·Manufacturing Standard ASME B16.9 MSS SP-75 JIS B2311 ... B, X42, X46, X52, X56, X60, X65, X70, X80 2) Stainless Steel ASTM A403 WP304, WP304L, WP304H, WP316, WP316L, WP317L, WP321, WP321HN ... requirement of type, standard, dimension, wall thickness and material. Stainless Steel Caps