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 

This 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. 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.