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.

Specification covers

Seamless,straight-seamless welded,

and heavily cold worked austenitic stainless steel pipe

Manufacture Process

Seamless (SML) Pipe

Length tolerance

+/- 5mm

Permitted Variations In 

Wall Thickness

                   Tolerance,% from Nominal          

NPS Designator                                         Over      Under

1/8 to 21/2 inc., all t/D ratios                       20         12.5

3 to 18 inc., t/D up to 5% incl.                      22.5      12.5

3 to 18 inc., t/D over 5%                              15          12.5

20 and larger,welded,all t/D ratios               17.5       12.5

20 and larger,seamless,t/D up to 5% incl.    22.5      12.5

20 and larger,seamless,t/D over 5%            15         12.5

 ----------------------------------------                                                       

  Where: t = Nominal Wall Thickness

         D = Ordered Outside Diameter

Inspection item

1. Size(outside,wall,length);
2. Surface of Pipe;
3. Chemical Composition
4. Mechanical Testing
5. Hydro-static Or Nondestructive Electric Test
6. ICT(Inter-granular Corrosion Test)  etc.

Ordering 

Information

• Quantity(feet,meters, or number of lengths)
• Steel Grade
• Size(outside diameter,nominal wall thickness,length)
• Test report requirements etc.