TP347 / TP347H ASTM A312 Seamless Stainless Steel Pipe Schedule 20 / 40 / 80

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 to 610mm

Wall Thickness

1mm to 40mm

Length

As Required

Type

Round,Square Or Other

Delivery condition

ColdRolled Or 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. 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.