TP316/ 316L TP 321 / 321H Austenitic Seamless Stainless Steel Pipe 6 Inch STD

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 800mm

Wall Thickness

0.5mm to 60mm

Length

Single Random ( 5 - 5.8 m), Double Random ( 10 -11.8 m )

Type

Round Pipe

Market

Middle East,South American, Africa etc.

Specificationcovers

Seamless,straight-seamlesswelded,

andheavilycoldworkedausteniticstainlesssteelpipe

ManufactureProcess

Seamless(SML)Pipe

Length tolerance

+/- 5mm

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.

Ordering

Information

• Quantity(feet,meters,ornumberoflengths)
• SteelGrade
• Size(outsidediameter,nominalwallthickness,length)
• Testreportrequirementsetc.