Standards & Specifications
Every product we supply is bought to a standard. These pages explain what each ASTM, ASME, MSS and EN standard covers, which grades it lists, and what to write on the order.
- ASTM
- ASME
- MSS
- EN
- NACE
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Three standards make one order line
Material, dimensions and inspection each have their own standard. The example below is a typical Alloy 825 flange line item.
Plate, sheet & strip
Pipe & tube
Pipe fittings
Flanges & forgings
Bolting
Dimensional standards
Quality & service
Standards — questions buyers ask
What is the difference between a material standard and a dimensional standard?
A material standard (for example ASTM B564 or A182) sets chemistry, mechanical properties, heat treatment and testing. A dimensional standard (for example ASME B16.5) sets sizes, pressure classes and tolerances. A flange order needs both.
What is the difference between ASTM and ASME SA / SB specifications?
ASME adopts ASTM material specifications into Section II of the Boiler and Pressure Vessel Code and prefixes them SA (ferrous) or SB (non-ferrous). ASTM A182 becomes ASME SA-182; ASTM B564 becomes SB-564. Pressure-equipment designs call for the ASME designation.
Which standards apply to Inconel 825?
ASTM B424 for plate, sheet and strip; B423 for seamless pipe and tube; B705 for welded pipe; B366 (WPNICMC) for buttweld fittings; B564 for flanges and forgings; and B425 for bar.
Which standards apply to SS 904L?
ASTM A240 for plate and sheet, A312 for pipe, A213 / A269 for tube, A403 WP904L for buttweld fittings and A182 F904L for flanges. Older editions of B625 (plate) and B677 (pipe) also listed 904L and still appear on some legacy purchase orders.