API 5L Pipeline

GNEE API 5L Seamless steel Pipe supply range

Chemical composition for APl 5L PSL1 pipe

APl 5L PSL 1 pipe Mechanical properties Tensile strength, Yeild strength, Elongation

Dimensions tolerance for API 5L pipe
a. For outer diameters less than 2 3/8 in (60.3 mm), pipe body diameter tolerance +/-0.5 mm. Pipe end +/- 0.5 mm; Out of Roundness tolerance for pipe body is 0.9 mm (0.036 in), pipe end 0.6 mm (0.024 mm).
b. For OD equal or above 2 3/8 in (60.3) to 24 in (610 mm), (diameter tolerance) for pipe body is +/- 0.0075D, pipe end +/- 0.005D but max to +/- 1.6 mm (0.063mm); Roundness tolerance for pipe body ≤ 0.015D, pipe end ≤ 0.01D.
c. For wall thickness
Below than 4 mm (0.0157 in), tolerance +0.6 (0.024 mm), -0.5 mm (0.020 in);
For API 5L seamless steel pipe thickness in 4 mm to 10 mm (0.394 in), +0.150t, -0.125t;
For API seamless pipe thickness 10 mm to 25mm (0.984 in), +/-0.125t;
Wall thickness ≥ 25 mm, +3.7mm or +0.1t (if larger) and -3.0 mm (0.120 in) or -0.1t (if larger).
t for thickness;
d. For straightness, max for full length, tolerance maximum 0.15% of length.
e. Straightness, max deviation for pipe end, shall be ≤ 0.3 mm /m.
f. Length +/- 200 mm for general, +/- 25.4 mm for special.

APPLICATION

Oil and Gas Transmission:
API 5L standard steel pipes are used in the manufacture of oil and gas transmission pipelines. These steel pipes have good corrosion resistance, high strength and weldability, and can transport fluids safely and efficiently in various harsh environments.
Refining and petrochemical industry:
Process Pipes: In refineries and chemical plants, API steel pipes are used to manufacture process pipes for transporting various fluids such as raw materials, intermediate products, and final products.
Other industrial applications:
Water treatment and water supply systems: API steel pipes are used to transport clean water in water treatment and water supply systems.
Buildings and Bridges: Due to its excellent structural properties, API steel pipes are also used as support structures for buildings and bridges.
Electric power and communications industry: API steel pipes are used in utility poles, communications towers and other infrastructur.

Seamless steel pipe manufacturing types
API 5L Seamless steel pipe production methods can be divided into: Hot-rolled seamless pipe, Cold drawn (rolled) pipe and tube, Thermal expansion pipe, Cold spinning tube and Squeeze tubes.

Hot Rolled Seamless steel pipe manufacturing process
Rolled Round Billets – Examination – Cut Off – Heating – Piercing – Elongation – Slight Tension Reducing – Straightening – Corp End Cutting Off – Visual Inspection – NDT – Hydrostatic Test – Ends Procession – Product Inspection – Painting and Marking – Packing – Warehousing

Cold Drawn (Rolled) seamless steel pipe manufacturing process
Mother pipe (Normally for hot rolled pipe) – Inspection – Annealing – Ends Treatment (Hitting and Drilling hole) – Pickling – Grinding – Phosphorization (Annoit) – Cold Drawn (Rolled) – Degreasing and Cleaning – Heat treatment (Solution treatment) – Straightening – Hydrostatic test – Painting and Marking – Warehousing

API STEEL TUBE TESTING

Hydrostatic test
Pipe to withstand a hydrostatic test without leakage through the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested.

Bend test
No cracks shall occur in any portion of the test piece and no opening of the weld shall occur.

Flattening test
Acceptance criteria for flattening test shall be:
EW pipes D<12.750 in:
X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall 50%.
For pipe with a D/t > 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original outside diameter.

Flattening test

Bend test

Hydrostatic test

Hardness Testing

RELATED PROJECTS

Project of LSAW Line Pipe

client:
Australia
quantity of delivery:
33500 meters API 5L pipeline
Year completed:
2016
Line pipe engineering material description
Welded Line Pipe, LSAW, Longitudinal Weld, Material Carbon Steel, 24" OD, Nominal Weight 171.29 lb/ft, Wall Thickness 0.688", Standard and Grade API 5L X60, Beveled End Design, Exterior Painted , additional supplementary specifications EM-18-00/03, nominal length 40 feet (+/-2 feet), product specification level PSL1.

DELIVERY

Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

GNEE PACKAGING AND SHIPPING

There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.Our packing can meet any needs of the customers.

Plastic caps plugged at the two sides of pipe ends
Should be avoided by the steel strapping and transport damage
Bundled signs should be uniform and consistent
The same bundle(batch) of steel pipe should be came from the same furnace.
The steel pipe has the same furnace number, the same steel grade, the same specifications.

 

 

 

 

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