AP Finished Seamless Stainless Steel Pipe ASTM A312 AISI304 304L 316L SS Pipe

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 325mm

Wall Thickness

0.5mm to 25mm

Length

6m, 12m, 18m

Type

Round Pipe

Specification covers

Seamless,straight-seamless welded,

and heavily cold worked austenitic stainless steel pipe

Manufacture Process

Seamless (SML) Pipe

Diameter Tolerance

+/-1%

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. 2.Surface of Pipe;
3. Chemical Composition;
4. 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.