The API 5L standard applies to steel pipes used in various pipeline systems for the transportation of oil and gas.
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Specification Levels
API 5L PSL 1 and API 5L PSL2
Pipe Grade/Steel Grade
L+number
The letter L is followed by the specified minimum yield strength in MPa
L175, L175P, L210, L245, L290, L320, L360, L390, L415, L450, L485, L555, L625, L690, L830;
X + number
X42, X46, X52, X56, X60, X65, X70, X80, X90, X100, X120;
Grade
grade A=L210, grade B=L245
API 5L PSL1 has grades A and B. API 5L PSL2 contains grade B.
Delivery Condition
R、N、Q、M;
Types of API 5L PSL2 pipes for special applications: Sour Service Condition Pipe（S）, Offshore Service Condition Pipe（O）, and Requiring Longitudinal Plastic Strain Capacity Pipe(G).
Raw Materials
Ingots, primary billets, billets, steel strips (coils), or plates;
Steel Pipe Types by API 5L
Welded Pipe: CW, COWH, COWL, EW, HFW, LFW, LW, SAWH and SAWL, etc;
Seamless Steel Pipe: SMLS;
Heat Treatment
normalized, tempered, quenched, quenched and tempered, Cold forming methods: cold expanding, cold sizing, cold finishing (usually cold drawing).
Pipe End Type
Socket end, flat end, special clamp flat end, threaded end.
Appearance of Common Defects
Bite Edge; Arc Burns; Delamination; Geometric deviations; Hardness.
Appearance and Size Inspection Items
1. Appearance;
2. Pipe weight;
3. Diameter and roundness;
4. Wall thickness ;
5. Length ;
6 . Straightness ;
7. Beveling angle ;
8. Beveling tonneau ;
9. Inner cone angle (only for seamless pipe) ;
10. Pipe end squareness (cut bevel) ;
11. Weld deviation.
Test Items
1. Chemical composition ;
2. Tensile Properties ;
3. Hydrostatic test ;
4. Bending test ;
5. Flattening test ;
6. Guided bending test ;
7. Hardness test ;
8. CVN impact test for API 5L PSL2 steel pipe ;
9. DWT test for API 5L PSL2 welded pipe ;
10. Macro-inspection and metallographic test;
11. Non-destructive testing (for three special-purpose API 5L PSL2 pipes only);
Replaces the API 5L Standard in Some Cases
ISO 3183, EN 10208, GB/T 9711, CSA Z245.1, GOST 20295, IPS, JIS G3454, G3455, G3456, DIN EN ISO 3183, AS 2885, API 5CT, ASTM A106, ASTM A53, ISO 3834, dnv-os-f101, MSS SP-75, NACE MR0175/ISO 15156.
tags :api 5l;api 5l 46;steelpipe;
Post time: Mar-22-2024