ASTM A539 Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines
1. Scope
1.1 This specification covers one grade of electric-resistance-welded coiled steel tubing 2-3/8 in.(60.3mm) and under in outside diameter and 0.035 to 0.125in. (0.89 to 3.18)mm, inclusive, in average wall thickness. The tubing is intended for conveyance of gas and fuel oil.
1.2 The values stated in inch-pound units are to be regarded as the standard.
2. Referenced Documents
2.1 ASTM Standards:
A 450/A 450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes/
E 30 Test Methods for Chemical Analysis of Stee, Cast Iron, Open-Hearth Iron, and Wrought Iron.
3. Ordering Information
3.1 Orders for material to this specification should include the following, as required, to describe the desired material adequately:
3.1.1 Quantity(number of feet),
3.1.2 Name of material (electric-resistance-welded tubing),
3.1.3 Tube size (specified outside diameter and wall thickness),
3.1.4 Check analysis,
3.1.5 Specification designation,
3.1.6 End use of material, and
4.1.7 Test pressure, if higher than minimum specified
4. Chemical Composition & Mechanical Properties
|
Standard
|
Chemical Composition, %, max.
|
Mechanical Properties, Mpa, min.
|
|
C
|
Mn
|
P
|
S
|
Tensile Strength
|
Yield Strength
|
|
ASTM A539
|
0.15
|
0.63
|
0.035
|
0.035
|
310
|
241
|
5. Height of Flash
5.1 The inside welding flash need not to be removed. The height of flash shall not exceed the wall thickness or 3/32 in.(4.8mm) whichever is smaller.
6. Dimension and Permissible Variation
6.1 The outside diameter shall not vary more than ±0.007 in. (±0.18 mm) from the specified size.
6.2 The minimum wall thickness at any point shall be not more than 10.0 % under the specified wall thickness.