Grades of material used for pipes

What are ASTM Grades

ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition of pipes, fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by “Grade”. Cortensteeltube.com is one of the leading corten steel suppliers in Mumbai .

For example, a carbon steel pipe can be identified with Grade A or B, a stainless-steel pipe with Grade TP304 or Grade TP321, a carbon steel fitting with Grade WPB etc.

Below you will find as an example 3 tables with chemical requirements for

1. Flanges ASTM A182 Grade F304, F304L F316L

2. Pipes ASTM A312 Grade TP304, TP304L, TP3016L

3. Fittings ASTM A403 Grade WP304, WP304L, WP316L

ASTM Materials

Pipes

1. A106▸ This specification covers carbon steel pipe for high-temperature service.

2. A335▸ This specification covers seamless ferritic alloy-steel pipe for high-temperature service.

3. A333▸ This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures.

4. A312▸ Standard specification for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.

Fittings

1. A234▸ This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction.

2. A420▸ Standard specification for piping fittings of wrought carbon steel and alloy steel for low-temperature service.

3. A403▸ Standard specification for wrought austenitic stainless steel piping fittings.

Flanges

1. A105▸ This specification covers standards for forged carbon steel piping components, that is, flanges, fittings, valves, and similar parts, for use in pressure systems at ambient and higher-temperature service conditions.

2. A182▸ This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service.

3. A350▸ This specification covers several grades of carbon and low alloy steel forged or ring-rolled flanges, forged fittings and valves for low-temperature service.

Valves

1. A216▸ This specification covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.

2. A217▸ This specification covers steel castings, martensitic stainless steel and alloys steel castings for valves, flanges, fittings, and other pressure-containing parts intended primarily for high-temperature and corrosive service.

3. A352▸ This specification covers steel castings for valves, flanges, fittings, and other pressure-containing parts intended primarily for low-temperature service.

4. A182▸ This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service.

Bolts and Nuts

1. A193▸ This specification covers alloy and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.

2. A320▸ Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service.

3. A194▸ Standard specification for nuts in many different material types.

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