API 5L ERW Carbon Steel Pipes

 

API 5L pipeline pipes possess high pressure resistance, low-temperature toughness, and good weldability. These characteristics ensure that API 5L pipeline pipes can withstand high pressure and low temperatures while transporting fluids such as oil and natural gas, maintaining the quality of the connections and overall performance of the pipeline.

The production process for API 5L pipeline pipes mainly includes continuous casting, continuous rolling, piercing, and pipe drawing. During manufacturing, it is essential to control the process parameters to ensure stable product quality and compliance with the relevant standards.

Welding is a crucial step in the production process of pipeline steel pipes, with common welding methods including Electric Resistance Welding (ERW). During welding, it is necessary to control parameters such as welding temperature and welding speed to ensure the quality and strength of the weld seam.

API 5L ERW Tube Specification

Grade	GR B, X42, X46, X52, X56, X60, X65, X70, etc.
Sizes	Nominal Size 1/2 inxh to 48 inch O.D. Pipe Wall Thickness - Schedule 10 through 160, STD, XS, XXS.
Thickness	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XS, SCH XXS, All API 5L ERW Pipe Wall Thickness available in stock
End	Plain, Bevel, Screwed, Threaded
Type	Welded, ERW, Fabricated, CDW
Length	Single Random, Double Random & Required Length, Custom Size - 12 Meter lengths
Packing	ERW Pipe Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

API 5L Black ERW Pipe 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspection of API 5L ERW Steel Pipes:

1. Sample Preparation for Various Tests:
Tensile Test
CVN Impact Test
Guided Bend Test
Hardness Test
Plate Weld Bead Test
Pipe Weld Bead Test
CTOD (Crack Tip Opening Displacement) Test

2. CTOD Test Specimens:
Specimens should be taken from the weld metal, heat-affected zone (HAZ), and base metal.
Preparation should follow the requirements of ISO 12135, ASTM E1290, or BS 7448.

3. Hardness Test:
Base Metal Hardness Test:
Conducted using the Vickers test method according to ISO 6507-1 or ASTM E92, or the Rockwell HR15N test method according to ISO 6508-1 or ASTM E18.
In case of disputes, the Vickers test method should be used.
HAZ and Weld Metal Hardness Test:
Conducted using the Vickers test method according to ISO 6507-1 or ASTM E92.

4. Criteria for Hardness Test:
In base metal tests, if a single-point hardness reading exceeds the acceptance limit, it may still be considered acceptable if:
The average of the smallest value among three points and the largest value among six additional points taken nearby does not exceed the acceptance limit.
The single-point reading exceeding the limit is within 10 HV10 or 2 HRC (whichever is applicable) above the limit.

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