ASTM A554/A249/A269/A312 Stainless Steel Welded Pipe in Stock

GNEE Stainless Steel is proud to offer high-quality ASTM A554/A249/A269/A312/A270 welded stainless steel pipes, which are widely exported to South American markets such as Peru, Brazil, Chile, and Argentina.
Packaging Options: Small bundles or large bundles (customizable).
Popular Surfaces: G180,G240 G320, G600 (see photos for reference).
Standard Sizes: 12.7×1.2mm, 15.88×1.2mm, 19.05×1.2mm, 25.4×1.5mm, 31.8×1.2mm, 38.1×1.2mm, 50.8×1.5mm (or 1/2" to 3" in imperial sizes).
Standard: ASTM, JIS, DIN, EN, AISI
Grade: 304, 304L, 316, 316L, 321, 201, 202, 430, 409, 904, 904L, S31803, S32205 etc.
Test: Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT
Trade Terms: FOB, CIF, CNF (flexible to your needs).
Packing: Each for Poly bag, Carton, Bundle, Steel crate, Wooden crate, Wooden case or customer request.

We look forward to working with you!
Email: sales@gneestainless.com

 

1. Main Inventory Stock Table

ASTM Standard	Primary Application	Available Grades	Size Range (OD × WT)	Surface Finish	Status
ASTM A554	Ornamental & Structural Tubing	201, 304, 304L, 316, 316L	OD: 9.5 mm – 101.6 mm WT: 0.5 mm – 3.0 mm	180# / 320# 400# / 600# Mirror	In Stock
ASTM A249	Boiler, Superheater & Heat Exchanger Tubes	304L, 316L, 321, 317L, 310S	OD: 12.7 mm – 76.2 mm WT: 0.89 mm – 3.05 mm	Bright Annealed (BA) /Annealed & Pickled (AP)	In Stock
ASTM A269	General Service & Sanitary / Instrumentation	304, 304L, 316, 316L, 904L	OD: 6.0 mm – 38.1 mm WT: 0.71 mm – 2.77 mm	Bright Annealed (BA) /MP	In Stock
ASTM A312	Industrial Process & Pressure Piping	304/304L, 316/316L, 321, 310S, S31803	NPS: 1/8" NB – 24" NB SCH: Sch 5S, 10S, 40S, 80S	Annealed & Pickled (AP) /Acid Washed	In Stock
ASTM A554 (Square)	Frame & Architectural Construction	201, 304, 316	Size: 10×10 – 100×100 mm WT: 0.6 mm – 4.0 mm	HL (Hairline) /600# Mirror	In Stock
ASTM A312 (Large Dia.)	Heavy Duty Chemical & Marine Piping	304L, 316L, 2205 Duplex	OD: 219 mm – 609 mm WT: 4.0 mm – 12.7 mm	Industrial Acid Pickled /Beveled Ends	Limited

 

ASTM Specification Comparison & Testing Requirements

Standard	Scope & Manufacturing Process	Key NDT / Quality Testing	Primary Applications
ASTM A554	Welded Mechanical & Decorative Tubing (Unannealed)	Dimensional inspection, surface finish checks, bend test	Handrails, balustrades, furniture, automotive exhaust, structural frames
ASTM A249	Welded Austenitic Steel Heat Exchanger & Condenser Tubes	Eddy Current Test, Hydrostatic Test, Flattening, Flange & Reverse Bend	Boilers, superheaters, condensers, shell-and-tube heat exchangers
ASTM A269	Seamless & Welded Tubing for General Service & Low-Temp Corrosion	Dimensional tolerances, Flare Test, Flange Test, Hydro / Eddy Current	Hydraulic lines, chemical instrumentation lines, food & beverage piping
ASTM A312	Seamless, Welded & Heavily Cold Worked Process Pipes	100% Radiographic / Eddy Current Inspection, Hydrotest, Intergranular Corrosion Test	Oil & gas process lines, petrochemical plants, paper mills, offshore platforms