ASTM A671 LSAW Steel Pipe
ASTM A671 LSAW steel pipe
Description
A671 straight seam welded pipe is an electric fusion welded (EFW) steel pipe that complies with the American ASTM A671 standard and is specially used for normal and low temperature high pressure conditions (such as liquefied natural gas transportation, chemical equipment, etc.). According to the A671 specification, heat treatment may or may not be required to obtain the required properties or meet the applicable specification requirements. Supplementary requirements will be provided when additional testing or inspection is required.
The A671 standard is generally applicable to steel pipes with an outer diameter of not less than 16in (400mm) and a wall thickness of not less than 14in (6mm). GNEE can provide steel pipes of other sizes if all other requirements of this specification are met.
ASTM A671 LSAW steel pipe specification
- OD:406-1422.40mm
- WT:1.65-40mm
- Length: 6mtr-20mtr
- Standard & Grade :ASTM A671 Grade CA55,CB 60,CB 65,CB 70 etc.
- Ends:Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
- Coating: 3PE Coating;3PP Coating;FBE Coating;Epoxy Coating;Special Painting
Plate Specification
Heat treatment parameters
Dimensions, Weights, and Permissible Deviations
1. The wall thickness and weight of steel pipe produced in accordance with this specification shall conform to the standard requirements for steel plates ordered by the manufacturer.
2. The permissible deviation of the dimensions at any point on each steel pipe shall not exceed the following requirements:
2.1 Outside diameter-measured by the circumference method, ± 0.5% of the specified outside diameter.
2.2 Ovality-the difference between the larger and smaller outside diameters, 1%.
2.3 Straightness-measured with a ruler 10f (3m) long with both ends close to the steel pipe, 1/8 in. (3 mm).
2.4 Wall thickness-the minimum wall thickness at any point on the steel pipe shall not be less than 0.01 in. (0.3 mm) less than the specified nominal wall thickness.
3. Circumferential welds of the same quality as longitudinal welds are acceptable by agreement between the manufacturer and the purchaser.
4. The deviation of the length of steel pipe without machined pipe ends shall be within the range of -0, +1/2in. (-0, +13mm) of the specified length. The allowable deviation of the length of steel pipe with machined pipe ends shall be agreed upon by the manufacturer and the purchaser.
ASTM A671 LSAW steel pipe
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