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API 5L Seamless Galvanized Pipe

API 5L galvanized pipe is a pipe with a layer of zinc on the surface of the steel pipe. The presence of the zinc layer gives the galvanized pipe good corrosion resistance. The chemical properties of zinc are more active than iron. In a corrosive environment, zinc will oxidize before iron, thereby protecting the steel pipe matrix from corrosion.

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API 5L galvanized pipe is a pipe with a layer of zinc on the surface of the steel pipe. The presence of the zinc layer gives the galvanized pipe good corrosion resistance. The chemical properties of zinc are more active than iron. In a corrosive environment, zinc will oxidize before iron, thereby protecting the steel pipe matrix from corrosion.
API 5L galvanized pipe is widely used in long-distance oil and natural gas pipelines on land and sea. In the construction of land pipelines, such as the West-East Gas Transmission Project, a large number of pipeline steels are used to build a huge gas pipeline network. In the oil and gas pipelines between offshore oil platforms and land, pipeline steel also plays a vital role. Due to the complexity of the marine environment, higher requirements are placed on the corrosion resistance and fatigue resistance of pipeline steel.

Specification of API 5L galvanized pipe

Processing Method Seamless and Welded
Size Range 1/8″- 48″ / DN6 – 1200
Thickness Schedule SCH 10, SCH 20, SCH 40, STD, XS, SCH 100, SCH 120, SCH 160, XXS
Length 6m or 12 m or Random
Standard ASME B36.10M
Surface Treatment Blasting and Painting , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade ASTM A106B / A53, API 5L B / X42 / 46 / 52 / 56 / 60 / 65 / 70, A333 GR 6

Weight Chart For Steel Pipe

Welded and Seamless Steel Pipe (ASME B36.10M)
Nominal Size OD kg/m
DN NPS mm Sch 10 Sch 20 Sch 30 STD Sch 40 Sch 60 XS Sch 80 Sch 100 Sch 120 Sch 140 Sch 160 XXS
6  1/8 10.3 0.28 0.32 0.37 0.37 0.47 0.47
8  1/4 13.7 0.49 0.54 0.63 63 0.8 0.8
10  3/8 17.1 0.83 0.7 0.84 0.84 1.1 1.1
15  1/2 21.3 1 1.12 1.27 1.27 1.62 1.62 1.95 2.55
20  3/4 26.7 1.28 1.44 1.69 1.69 2.2 2.2 1.9 364
25 1 33.4 2.09 2.18 2.5 2.5 3.24 3.24 4.24 5.45
32 1 1/4 42.2 2.7 287 3.39 3.39 4.47 4.47 5.16 7.77
40 1 1/2 48.3 3.11 3.53 4.05 4.05 5.41 5.41 7.25 9.58
50 2 60.3 3.03 4.48 5.44 5.44 7.48 7.48 11.11 13.44
65 2 1/2 73 5.26 8.04 8.63 863 11,41 11.41 14.92 20.39
80 3 88.9 6.45 9.92 11.29 1.29 15.72 15.72 21.35 27.68
90 3 1/2 101.6 7.4 1.41 13.57 13.57 18.63 18.63
0 4 114.3 8.38 12.91 18.07 16.07 22.32 22.32 28.32 33.54 41.03
25 5 141.3 11.57 21.77 21.77 30.97 30.87 40.28 40.11 57.43
50 6 168.3 13.48 28.26 28.26 42.58 42.56 5420 67.58 79.22
8 219.1 19.98 33.31 36.81 42.55 42.55 53.08 84.64 84.84 75.92 90.44 100.9 11.3 107.9
10 273 27.78 41.77 51.03 60.31 60.31 81.55 81.55 96.01 114 133.1 155.2 172.3 155.2
12 323.9 36 49.72 85.2 73.88 79.73 109 97.48 32.1 159.9 87 208.1 238 187
350 14 355.6 54.69 67.9 81.33 81.33 94.55 126.7 107.4 58.1 195 224.7 253.6 281.7
400 16 406.4 62.64 77.83 93.27 93.27 123.3 160.1 123.3 209.5 2456 206.7 333.2 365.4
450 18 457 70.57 37.71 122.4 105.2 155.8 205.7 139.2 254.6 4098 363.8 408.3 459.4
500 20 508 78.55 117.2 155.1 117.2 183.4 247.8 155.1 311.2 381.5 441.5 508.1 564.8
550 22 559 86.54 129.1 171.1 129.1 294.2 171.1 373.8 451.4 527 611 672.2
500 24 610 94.53 141.1 209.6 141.1 255.4 355.3 187.1 442.1 547.7 640 720.2 808.2
650 26 660 127.4 202.7 152.9 202.7
700 28 711 137.3 218.7 271.2 184.9 218.7
750 30 762 147.3 234.7 292.2 176.8 234.7
800 32 813 157.2 250.8 312.2 188.8 342.9 2508
850 34 884 187.2 286.8 332.1 200.2 364.9 288.8
900 36 914 177 282.3 351.7 212.6 420.4 282.3
950 38 965 224.5 298.2
1000 40 1016 236.5 314.2
50 42 1087 248.5 330.2
1100 44 1118 281.5 340.2
1150 46 1168 272.3 3518
1200 48 1219 284.2 377.8

Characteristics of API 5L galvanized pipe

Pipeline steel has high yield strength and tensile strength. For example, X70 pipeline steel has a yield strength of more than 485MPa and a tensile strength of more than 570MPa. This enables pipeline steel to withstand the high pressure generated by oil and natural gas during long-distance transportation, ensuring that the pipeline will not be excessively deformed or ruptured due to internal pressure during operation.

Pipeline steel needs to have good toughness, especially in low temperature environments. By controlling the microstructure and chemical composition, pipeline steel has high impact toughness. For example, at -20℃ or even lower, its Charpy impact energy can meet strict standard requirements. This feature can prevent brittle fracture of pipelines in cold areas or when subjected to accidental impact, ensuring the safe operation of pipelines.

The weldability of pipeline steel is one of its important characteristics. In pipeline construction, a large amount of welding work needs to be carried out. The chemical composition and microstructure design of pipeline steel enable it to ensure that the strength, toughness and other properties of the welded joint are similar to those of the parent material when using appropriate welding processes. For example, when using automatic welding technology, by controlling parameters such as welding current,Although the corrosion resistance of pipeline steel may be weaker than some special anti-corrosion materials, it still has a certain corrosion resistance. Alloy elements such as chromium and nickel in pipeline steel can form a dense oxide film on the surface of the steel to prevent the invasion of external corrosive media. In some areas with weak soil corrosion, pipeline steel can rely on its own corrosion resistance to maintain normal use for a long time.

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