... )Stainless steel(ASTM A403 WP304,304L,316,316L,321.ect)Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,ect ... 'requirementsapplicationPetroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etcqualityfirst gradeOthers1.special design available according to requirement. 2.anti-corrosion and high ...