ASTM A312 A269 A213 Stainless Steel Square Tubing Thick Wall 1 - 12mm

Standard Specification

ASTM A312,A213,A249,A269,A270A789,A554,A790,etc.

Material

304,304L,309S,310S,316L,317L,321,,347,347H,2205 etc.

Outer Diameter

6mm to700mm

Wall Thickness

1mm to 12mm

Length

5mm to 12000mm

Type

Round

Delivery condition

Hot Rolled

Thisspecificationcovers

Seamless,straight-seamlesswelded,

andheavilycoldworkedausteniticstainlesssteelpipe

ManufactureProcess

Seamless(SML)Pipe

DiameterTolerance

+/-1%

PermittedVariationsIn

WallThickness

Tolerance,%fromNominal

NPSDesignator OverUnder

1/8to21/2inc.,allt/Dratios 2012.5

3to18inc.,t/Dupto5%incl. 22.512.5

3to18inc.,t/Dover5% 15 12.5

20andlarger,welded,allt/Dratios 17.512.5

20andlarger,seamless,t/Dupto5%incl. 22.5 12.5

20andlarger,seamless,t/Dover5% 15 12.5

Where:t=NominalWallThickness

D=OrderedOutsideDiameter

Inspectionitem

1. Size(outside,wall,length);


2. SurfaceofPipe;


3. ChemicalComposition;


4. MechanicalTesting


5. Hydro-staticOrNondestructiveElectricTest


6. ICT(Inter-granularCorrosionTest)etc.

OrderingInformation

• Quantity(feet,meters,ornumberoflengths)


• SteelGrade


• Size(outsidediameter,nominalwallthickness,length)


• Testreportrequirementsetc.