3pe anti-corrosion steel pipe: high performance outer wall anti-corrosion solution
3pe anti-corrosion steel pipe is designed for harsh environments, its outer wall anti-corrosion structure consists of three layers of materials, providing comprehensive protection to ensure the reliability and durability of the pipe in a variety of environments.
I. Bottom layer: epoxy powder
a. The bottom layer of 3pe anticorrosive steel pipe adopts epoxy powder, which is tightly attached to the surface of the steel pipe through electrostatic spraying process, with a thickness of 0.1-0.3mm.
b. Epoxy powder has strong adhesion and chemical corrosion resistance, can effectively isolate the external corrosive medium, to provide basic protection for the pipeline.
II. Intermediate layer: adhesive layer
a. The thickness of the intermediate layer is 0.1-0.2 mm, which is the bridge connecting the bottom layer of epoxy powder and the outer layer of polyethylene.
b. It ensures the integrity and stability of the three-layer structure and significantly improves the protective effect of 3PE anti-corrosion steel pipe.
III. Outer layer: polyethylene protective layer
The outer layer is polyethylene, with a thickness of 1.8-3.7 mm, which has excellent mechanical properties and anti-aging ability, and can resist external factors such as ultraviolet rays, abrasion and impact to extend the service life of the pipe.
IV. Summary: the advantages of 3pe anti-corrosion steel pipe
With its three-layer structure, 3pe anticorrosion steel pipe excels in corrosion resistance, anti-aging and mechanical properties, and is widely used in oil and natural gas transmission and marine engineering to ensure the long-term stable operation of pipelines.
Theoretical weight table of working steel pipe
Theoretical weight table of LSAW steel pipe:
Outer diameter: mm
Wall Thickness：mm
Theoretical weight: Kg/m
| Outer Diameter / Wall Thickness | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 1.82 | 2.15 | 2.46 | 2.76 | 3.05 | 3.33 | 3.59 | 3.85 | 4.09 | 4.32 | 4.53 |
| 38 | 2.19 | 2.59 | 2.98 | 3.35 | 3.72 | 4.07 | 4.41 | 4.74 | 5.05 | 5.35 | 5.64 |
| 42 | 2.44 | 2.89 | 3.35 | 3.75 | 4.16 | 4.56 | 4.95 | 5.33 | 5.69 | 6.04 | 6.38 |
| 45 | 2.62 | 3.11 | 3.58 | 4.04 | 4.49 | 4.93 | 5.36 | 5.77 | 6.17 | 6.56 | 6.94 |
| 50 | 2.93 | 3.48 | 4.01 | 4.54 | 5.05 | 5.55 | 6.04 | 6.51 | 6.97 | 7.42 | 7.86 |
| 54 | - | 3.77 | 4.36 | 4.93 | 5.49 | 6.04 | 6.58 | 7.10 | 7.61 | 8.11 | 8.60 |
| 57 | - | 4.00 | 4.62 | 5.23 | 5.83 | 6.41 | 6.99 | 7.55 | 8.10 | 8.63 | 9.16 |
| 60 | - | 4.22 | 4.88 | 5.52 | 6.16 | 6.78 | 7.39 | 7.99 | 8.58 | 9.15 | 9.71 |
| 63.5 | - | 4.48 | 5.18 | 5.87 | 6.55 | 7.21 | 7.87 | 8.51 | 9.14 | 9.75 | 10.36 |
| 68 | - | 4.81 | 5.57 | 6.31 | 7.05 | 7.77 | 8.48 | 9.17 | 9.86 | 10.53 | 11.19 |
| 70 | - | 4.96 | 5.74 | 6.51 | 7.27 | 8.01 | 8.75 | 9.47 | 10.18 | 10.88 | 11.56 |
| 73 | - | 5.18 | 6.00 | 6.81 | 7.60 | 8.38 | 9.16 | 9.91 | 10.66 | 11.39 | 12.11 |
| 76 | - | 5.40 | 6.26 | 7.10 | 7.93 | 8.75 | 9.56 | 10.36 | 11.14 | 11.91 | 12.67 |
| 83 | - | - | 6.86 | 7.79 | 8.71 | 9.62 | 10.51 | 11.39 | 12.26 | 13.12 | 13.96 |
| 89 | - | - | 7.38 | 8.38 | 9.38 | 10.36 | 11.33 | 12.28 | 13.22 | 14.16 | 15.07 |
| 95 | - | - | 7.90 | 8.98 | 10.04 | 11.10 | 12.14 | 13.17 | 14.19 | 15.19 | 16.18 |
| 102 | - | - | 8.50 | 9.67 | 10.82 | 11.96 | 13.09 | 14.21 | 15.31 | 16.40 | 17.48 |
| 108 | - | - | - | 10.26 | 11.49 | 12.70 | 13.90 | 15.09 | 16.27 | 17.44 | 18.59 |
| 114 | - | - | - | 10.85 | 12.15 | 13.44 | 14.72 | 15.98 | 17.23 | 18.47 | 19.70 |
| Outer Diameter / Wall Thickness | 3.0 | 3.2 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 |
|---|---|---|---|---|---|---|---|---|---|---|
| (76) | 5.40 | 5.75 | 6.26 | 7.10 | 7.93 | 8.75 | 9.56 | 10.36 | 11.14 | 11.91 |
| 80 | 5.69 | 6.07 | 6.60 | 7.49 | 8.37 | 9.24 | 10.07 | 10.91 | 11.75 | 12.59 |
| (83) | 5.92 | 6.31 | 6.86 | 7.79 | 8.71 | 9.62 | 10.51 | 11.39 | 12.26 | 13.12 |
| 85 | 6.06 | 6.46 | 7.04 | 7.98 | 8.93 | 9.86 | 10.75 | 11.65 | 12.55 | 13.45 |
| (89) | 6.36 | 6.77 | 7.38 | 8.38 | 9.38 | 10.38 | 11.33 | 12.28 | 13.22 | 14.16 |
| 90 | 6.43 | 6.86 | 7.47 | 8.47 | 9.49 | 10.47 | 11.42 | 12.39 | 13.35 | 14.31 |
| 95 | 6.81 | 7.26 | 7.90 | 8.98 | 10.04 | 11.10 | 12.14 | 13.17 | 14.19 | 15.19 |
| 100 | 7.17 | 7.65 | 8.32 | 9.46 | 10.59 | 11.71 | 12.77 | 13.87 | 14.95 | 16.03 |
| (102) | 7.32 | 7.81 | 8.50 | 9.67 | 10.82 | 11.96 | 13.09 | 14.21 | 15.31 | 16.40 |
| (108) | 7.77 | 8.29 | 9.02 | 10.26 | 11.49 | 12.70 | 13.90 | 15.09 | 16.27 | 17.44 |
| 110 | 7.92 | 8.43 | 9.19 | 10.46 | 11.70 | 12.93 | 14.19 | 15.40 | 16.60 | 17.75 |
| 120 | 8.66 | 9.22 | 10.06 | 11.44 | 12.93 | 14.30 | 15.51 | 16.89 | 18.20 | 19.50 |
| 125 | 9.02 | 9.61 | 10.50 | 11.91 | 13.37 | 14.80 | 16.15 | 17.55 | 19.02 | 20.35 |
| 130 | 9.40 | 10.00 | 10.92 | 12.43 | 13.92 | 15.48 | 16.88 | 18.35 | 19.80 | 21.20 |
| (133) | 9.59 | 10.25 | 11.18 | 12.75 | 14.26 | 15.75 | 17.29 | 18.79 | 20.28 | 21.75 |
| 140 | 10.11 | 10.79 | 11.80 | 13.42 | 15.05 | 16.65 | 18.24 | 19.83 | 21.40 | 22.96 |
| 150 | 10.85 | 11.52 | 12.65 | 14.39 | 16.11 | 17.85 | 19.55 | 21.25 | 23.00 | 24.68 |
| 160 | - | - | 13.53 | 15.38 | 17.25 | 19.09 | 20.96 | 22.79 | 24.60 | 26.41 |
| 170 | - | - | 14.31 | 16.31 | 18.35 | 20.30 | 22.31 | 24.27 | 26.21 | 28.14 |
| 180 | - | - | 15.20 | 17.30 | 19.50 | 21.59 | 23.67 | 25.75 | 27.81 | 29.87 |
| 190 | - | - | - | 18.29 | 20.60 | 22.80 | 25.02 | 27.22 | 29.41 | 31.59 |
| 200 | - | - | - | 19.67 | 21.65 | 24.00 | 26.38 | 28.70 | 31.02 | 33.32 |
Theoretical weight table of seamless steel pipe:
Outer diameter: mm
Wall Thickness：mm
Theoretical weight：Kg/m
| Outer Diameter / Wall Thickness | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 1.82 | 2.15 | 2.46 | 2.76 | 3.05 | 3.33 | 3.59 | 3.85 | 4.09 | 4.32 | 4.53 |
| 38 | 2.19 | 2.59 | 2.98 | 3.35 | 3.72 | 4.07 | 4.41 | 4.74 | 5.05 | 5.35 | 5.64 |
| 42 | 2.44 | 2.89 | 3.35 | 3.75 | 4.16 | 4.56 | 4.95 | 5.33 | 5.69 | 6.04 | 6.38 |
| 45 | 2.62 | 3.11 | 3.58 | 4.04 | 4.49 | 4.93 | 5.36 | 5.77 | 6.17 | 6.56 | 6.94 |
| 50 | 2.93 | 3.48 | 4.01 | 4.54 | 5.05 | 5.55 | 6.04 | 6.51 | 6.97 | 7.42 | 7.86 |
| 54 | - | 3.77 | 4.36 | 4.93 | 5.49 | 6.04 | 6.58 | 7.10 | 7.61 | 8.11 | 8.60 |
| 57 | - | 4.00 | 4.62 | 5.23 | 5.83 | 6.41 | 6.99 | 7.55 | 8.10 | 8.63 | 9.16 |
| 60 | - | 4.22 | 4.88 | 5.52 | 6.16 | 6.78 | 7.39 | 7.99 | 8.58 | 9.15 | 9.71 |
| 63.5 | - | 4.48 | 5.18 | 5.87 | 6.55 | 7.21 | 7.87 | 8.51 | 9.14 | 9.75 | 10.36 |
| 68 | - | 4.81 | 5.57 | 6.31 | 7.05 | 7.77 | 8.48 | 9.17 | 9.86 | 10.53 | 11.19 |
| 70 | - | 4.96 | 5.74 | 6.51 | 7.27 | 8.01 | 8.75 | 9.47 | 10.18 | 10.88 | 11.56 |
| 73 | - | 5.18 | 6.00 | 6.81 | 7.60 | 8.38 | 9.16 | 9.91 | 10.66 | 11.39 | 12.11 |
| 76 | - | 5.40 | 6.26 | 7.10 | 7.93 | 8.75 | 9.56 | 10.36 | 11.14 | 11.91 | 12.67 |
| 83 | - | - | 6.86 | 7.79 | 8.71 | 9.62 | 10.51 | 11.39 | 12.26 | 13.12 | 13.96 |
| 89 | - | - | 7.38 | 8.38 | 9.38 | 10.36 | 11.33 | 12.28 | 13.22 | 14.16 | 15.07 |
| 95 | - | - | 7.90 | 8.98 | 10.04 | 11.10 | 12.14 | 13.17 | 14.19 | 15.19 | 16.18 |
| 102 | - | - | 8.50 | 9.67 | 10.82 | 11.96 | 13.09 | 14.21 | 15.31 | 16.40 | 17.48 |
| 108 | - | - | - | 10.26 | 11.49 | 12.70 | 13.90 | 15.09 | 16.27 | 17.44 | 18.59 |
| 114 | - | - | - | 10.85 | 12.15 | 13.44 | 14.72 | 15.98 | 17.23 | 18.47 | 19.70 |
| 121 | - | - | - | 11.54 | 12.93 | 14.30 | 15.67 | 17.02 | 18.35 | 19.68 | 20.99 |
| 127 | - | - | - | 12.13 | 13.59 | 15.04 | 16.48 | 17.90 | 19.32 | 20.72 | 22.10 |
| 133 | - | - | - | 12.73 | 14.26 | 15.78 | 17.29 | 18.79 | 20.28 | 21.75 | 23.21 |
| 140 | - | - | - | - | 15.04 | 16.65 | 18.24 | 19.83 | 21.40 | 22.96 | 24.51 |
| 146 | - | - | - | - | 15.70 | 17.39 | 19.06 | 20.72 | 22.36 | 24.00 | 25.62 |
| 152 | - | - | - | - | 16.37 | 18.13 | 19.87 | 21.60 | 23.32 | 25.03 | 26.73 |
| 159 | - | - | - | - | 17.15 | 18.99 | 20.82 | 22.64 | 24.45 | 26.24 | 28.02 |
| 168 | - | - | - | - | - | 20.10 | 22.04 | 23.97 | 25.89 | 27.79 | 29.69 |
| 180 | - | - | - | - | - | 21.59 | 23.70 | 25.75 | 27.70 | 29.87 | 31.91 |
| 194 | - | - | - | - | - | 23.31 | 25.60 | 27.82 | 30.00 | 32.28 | 34.50 |
| 203 | - | - | - | - | - | - | - | 29.14 | 31.50 | 33.83 | 36.16 |
| 219 | - | - | - | - | - | - | - | 31.52 | 34.06 | 36.60 | 39.12 |
| 245 | - | - | - | - | - | - | - | - | 38.23 | 41.09 | 43.85 |
| 273 | - | - | - | - | - | - | - | - | 42.64 | 45.92 | 49.10 |
| 299 | - | - | - | - | - | - | - | - | - | - | 53.91 |
| 325 | - | - | - | - | - | - | - | - | - | - | 58.74 |
Theoretical weight table of spiral steel pipe:
Outer diameter: mm
Wall Thickness：mm
Theoretical weight：Kg/m
| Outer Diameter / Wall Thickness | 5.0 | 5.5 | 6.0 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 16.0 | 18.0 | 20.0 | 22.0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 219 | 26.39 | 28.96 | 31.51 | 36.60 | 41.63 | |||||||||||
| 273 | 33.04 | 36.28 | 39.51 | 45.92 | ||||||||||||
| 325 | 39.46 | 43.33 | 47.26 | 54.90 | 62.54 | 70.13 | ||||||||||
| 377 | 45.88 | 50.39 | 54.89 | 63.87 | 72.80 | 81.67 | ||||||||||
| 426 | 51.91 | 57.03 | 62.14 | 72.33 | 82.46 | 92.55 | 102.59 | |||||||||
| 457 | 55.73 | 61.24 | 66.73 | 77.69 | 88.58 | 99.43 | 110.23 | 120.98 | 131.60 | 142.34 | ||||||
| 508 | 74.28 | 86.48 | 98.64 | 110.75 | 122.81 | 134.82 | 146.78 | 158.69 | ||||||||
| 529 | 77.38 | 90.11 | 102.78 | 115.41 | 127.99 | 140.51 | 152.99 | 165.42 | ||||||||
| 559 | 81.82 | 95.29 | 108.70 | 122.07 | 135.38 | 148.65 | 161.87 | 175.04 | ||||||||
| 610 | 89.37 | 104.09 | 118.76 | 133.39 | 147.96 | 162.48 | 176.96 | 191.39 | ||||||||
| 630 | 92.33 | 107.54 | 122.71 | 137.82 | 152.89 | 167.91 | 182.88 | 197.80 | ||||||||
| 660 | 96.77 | 112.72 | 128.63 | 144.48 | 160.29 | 176.05 | 191.76 | 207.42 | ||||||||
| 720 | 105.64 | 123.08 | 140.46 | 157.80 | 175.09 | 192.32 | 209.51 | 226.65 | ||||||||
| 820 | 140.34 | 160.19 | 179.99 | 199.75 | 219.45 | 239.10 | 258.71 | 276.26 | 297.77 | 317.23 | 256.01 | 394.58 | 432.96 | |||
| 914 | 178.74 | 200.06 | 222.93 | 244.95 | 266.92 | 288.84 | 310.72 | 332.54 | 354.31 | 397.74 | 440.95 | 483.96 | ||||
| 920 | 179.92 | 202.19 | 224.41 | 246.58 | 268.70 | 290.77 | 312.79 | 334.76 | 356.68 | 400.40 | 443.91 | 486.13 | ||||
| 1016 | 198.86 | 223.49 | 248.08 | 272.62 | 297.10 | 321.54 | 345.93 | 370.27 | 394.56 | 443.02 | 491.26 | 539.30 | ||||
| 1020 | 199.65 | 224.38 | 249.07 | 273.70 | 298.39 | 322.82 | 347.31 | 371.75 | 396.14 | 444.79 | 493.23 | 541.47 | ||||
| 1220 | 296.39 | 327.95 | 357.47 | 386.94 | 416.36 | 445.73 | 475.58 | 533.58 | 591.88 | 649.98 | ||||||
| 1420 | 347.71 | 362.21 | 416.66 | 451.06 | 485.41 | 519.71 | 553.96 | 622.36 | 690.52 | 758.49 | ||||||
| 1620 | 397.03 | 436.46 | 475.84 | 515.17 | 554.46 | 593.60 | 632.87 | 711.14 | 789.17 | 867.00 | ||||||
| 1820 | 446.35 | 490.71 | 535.02 | 579.29 | 623.50 | 667.67 | 711.79 | 799.92 | 887.81 | 975.51 | ||||||
| 2020 | 495.67 | 544.96 | 594.21 | 643.40 | 692.55 | 741.65 | 796.70 | 888.70 | 986.46 | 1084.21 | ||||||
| 2220 | 544.99 | 599.21 | 653.39 | 707.52 | 761.60 | 815.63 | 869.61 | 977.48 | 1085.11 | 1192.53 |
3pe anticorrosion steel pipe implementation standard:
| Standard Name | Standard Number | Applicability | Coating Thickness | Adhesion |
|---|---|---|---|---|
| Chinese National Standard | GB/T 23257-2017 | Buried steel pipelines | Total thickness ≥ 0.3mm, Enhanced grade 2.5-3.7mm | Peel strength ≥ 30N/cm |
| Chinese Industry Standard | SY/T 0413-2002 | Buried steel pipelines | Refer to German DIN30670 standard | Peel strength ≥ 30N/cm |
| International Standard | ISO 21809 | Petroleum and natural gas pipelines | Total thickness ≥ 0.3mm | High adhesion, Peel strength ≥ 30N/cm |
| American Petroleum Institute Standard | API 5L | Petroleum and natural gas pipelines | As per specific project requirements | High adhesion |
| European Standard | EN 10208-2 | Petroleum and natural gas pipelines | As per specific project requirements | High adhesion |
3pe anticorrosion steel pipe detailed parameter description:
1. Coating structure
The coating structure of 3pe anticorrosion steel pipe consists of three layers of materials to ensure its excellent anti-corrosion performance:
(1) Epoxy powder (FBE): the bottom layer, the thickness is more than 100μm, with good adhesion and corrosion resistance.
(2) Adhesive (AD): intermediate layer, with a thickness of 170-250 μm, connecting the epoxy powder and the polyethylene.
(3) Polyethylene (PE): outer layer, thickness 1.8-3.7mm, with abrasion and impact resistance.
2. Coating thickness
The coating thickness of 3PE anti-corrosion steel pipe meets several standards:
(1) According to the national standard GB/T 23257-2017, the total thickness should be ≥0.3mm, and the enhanced grade is 2.5-3.7mm.
(2) International standards such as ISO 21809 and API 5L also require the total thickness ≥ 0.3mm.
3. Adhesion
3PE anticorrosion coated steel pipe has strong adhesion between the coating and the surface of the steel pipe, peeling strength ≥ 30N/cm.
4. Impact resistance
The impact strength of 3pe anticorrosion coated steel pipe is required to be ≥10J, which ensures that the coating is not easily damaged during construction and use.
5. Corrosion resistance
The coating of 3pe corrosion resistant steel pipe has excellent chemical resistance and soil corrosion resistance, which is suitable for conveying oil, natural gas, sewage and other media.
6. Other requirements
The surface treatment of the steel pipe needs to reach Sa2.5 grade to ensure the adhesion of the coating.
The surface of the coating should be flat and smooth, without bubbles, cracks and other defects.
| Pipe diameter | 20mm-1600mm |
|---|---|
| Wall thickness | 2-20mm optional, to meet different pressure requirements. |
| Material | Q235B, Q345B |
| Anti-corrosion layer thickness | General bottom epoxy powder 0.1-0.3mm, intermediate adhesive 0.1-0.2mm, outer polyethylene 1.8-3.7mm. |
| Coating adhesion | More than 100N/cm, to ensure a firm coating. |
| Impact resistance | More than 5J, strong resistance to external impact. |
| Compressive strength | It can withstand certain pressure and meet the requirements of pipeline operation. |
| Execution standard | GB/T 23257-2017, ISO, ASTM. |
| Service life | Up to 20-50 years under normal environment. |
| Connection | Welding, flange connection, groove connection, etc. |