Classification of carbon steel reducers

　　1. By material:

　　 carbon steel reducers: ASTM / ASME a234 WPB, WPC

　　Alloy: ASTM / ASME a234 WP 1-wp 12-wp 11-wp 22-wp 5-wp 91-wp911, 15Mo3, 15CrMoV, 35crmov

　　Stainless steel: ASTM / ASME A403 WP 304-304l-304h-304ln-304n

　　ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti

　　ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H

　　Low temperature steel: ASTM / ASME A402 wpl3-wpl 6

　　High performance steel: ASTM / ASME a860 wphy 42-46-52-60-65-70

　　Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, PVC, PPR, rfpp (reinforced polypropylene), etc.

　　2. According to the manufacturing method, it can be divided into pushing, pressing, forging and casting.

　　3. According to manufacturing standards, it can be divided into national standard, electrical standard, ship standard, chemical standard, water standard, American Standard, German standard, Japanese standard, Russian standard, etc.

　　4. According to pressure rating: there are about 17 kinds, which are the same as American pipe standards, including: sch5s, sch10s, sch10, sch20, sch30, sch40s, STD, sch40, sch60, sch80s, XS; Sch80、SCH100、Sch120、Sch140、Sch160、XXS; The most commonly used are STD and XS.