ASTM A105/A105M Flanges Supplier in the United States

ASTM A105 identifies the forged carbon steel material and its material requirements. ASME B16.5 establishes the dimensional and pressure-temperature framework for applicable pipe flanges and flanged fittings from NPS 1/2 through NPS 24. A complete purchase description may therefore specify ASTM A105 material together with ASME B16.5, the required NPS size, pressure class, flange type and facing.

A105N is commonly used in industry to identify ASTM A105 material supplied in a normalized condition. Normalizing is a heat-treatment process intended to produce a refined and relatively uniform microstructure. The purchase order should explicitly state the required material condition and the applicable ASTM edition rather than relying only on informal grade terminology.

A105 flanges can be supplied in commonly specified ASME pressure classes including Class 150, 300, 400, 600, 900, 1500 and 2500, subject to the applicable size and standard limitations. Common configurations include Weld Neck, Slip-On, Blind, Socket Weld, Threaded and Lap Joint flanges. Available facings include Raised Face, Flat Face and Ring Type Joint. The class number should not be interpreted as a universal pressure value; allowable pressure depends on material, temperature and the applicable pressure-temperature rating.

Depending on the purchase order and inspection plan, testing may include chemical analysis, tensile testing, hardness testing, dimensional inspection, visual inspection and hydrostatic testing where applicable. Additional NDE such as ultrasonic, magnetic-particle or liquid-penetrant examination can be specified. Documentation may include a Material Test Certificate, Certificate of Conformance, heat-treatment records, dimensional reports and applicable NDE reports.

For an accurate quotation, provide material grade and condition, nominal pipe size, pipe schedule or bore, flange type, ASME pressure class, facing, applicable dimensional standard, quantity, inspection and NDE requirements, certification requirements, delivery destination and packaging requirements. A clear specification such as ASTM A105N, ASME B16.5, Class 600, NPS 4, Weld Neck, Raised Face, Schedule 80 Bore, MTC Required, Quantity 25 Nos. gives the manufacturer the information needed to establish the correct product configuration.