Anti-corrosion polypropylene wrapping for bent pipes
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Product Description
Polypropylene Cold-Wrapped Anti-Corrosion Elbow: Production and Processing Range φDN80—ΦDN1800
Polypropylene cold-wrap tape is a new type of environmentally friendly anti-corrosion product that is pollution-free and harmless, representing the highest current international and domestic standards for cold-wrap anti-corrosion tapes. It is famously known as the "King of Anti-Corrosion." This tape can be widely used in water supply and drainage systems, as well as in the transportation of oil, gas, and coal gas through steel pipelines and underground steel storage tanks in the petroleum, natural gas, chemical, and urban construction industries. It has been designated by the Ministry of Construction and the State Environmental Protection Administration as a recommended alternative to "asphalt-glass fiber cloth" and "epoxy coal tar." It features easy application, high impact resistance, excellent aging resistance, superior tensile strength, resistance to ultraviolet radiation, and strong bonding performance.
The product’s base material is a unique modified polypropylene woven fiber fabric, with a corrosion-resistant adhesive layer made of butyl rubber-modified asphalt. The fiber-based substrate effectively resists creep damage caused by soil stresses. Aging tests have demonstrated that its corrosion resistance lifespan exceeds 50 years. All tested performance indicators significantly surpass the requirements of the SY/T0414—2007 standard and fully meet the specifications set forth by the U.S. ANSI/AWWAC209-00 and NACE MR0274-95 standards. It is the preferred choice for cold-applied anti-corrosion tapes for pipelines and represents an excellent cost-performance option for corrosion protection.
I. Performance Specifications: Polypropylene Reinforced Fiber Anti-Corrosion Tape
1. Model: SXB
2. Color: Black, gray, green, or other colors
3. Specifications and Models: 50, 75, 100, 150, 250, 300
4. Thickness (mm)
Basement membrane: 0.30, 0.30, 0.70, 0.55, 0.40, 0.50
Adhesive layer: 0.85, 0.90, 1.10, 0.95, 1.00, 1.05
Total thickness: 1.15, 1.20, 1.40, 1.50, 1.60, 1.65
5. Tensile strength ≥ 60 MPa
6. Peel strength, MPa: ≥45 for primer-coated steel; ≥25 for tape backing material.
7. Dielectric strength, kV/mm ≥ 30
8. Volume resistivity Ω·m > 1×10
9. Water vapor transmission rate (24h): <0.45 mg/cm²
10. Heat aging test (2400 h) < 25%
11. UV aging resistance (168 h) ≥ 80%
12. Water absorption rate < 0.35%
13. Operating temperature (℃): 5-50
II. Instructions for Use:
(1) Steel pipe surface treatment: Remove rust, weld slag, burrs, oil, and contaminants, and ensure the surface is clean and dry. Manual rust removal shall meet the St3 grade, while mechanical rust removal shall achieve the Sa2 grade.
(2) Applying Primer: Use a dedicated, matching primer. Keep away from sources of ignition during application. Stir thoroughly and apply evenly using a clean brush, roller, or other mechanical method. Primer consumption rate: 12 m²/L for manual application; 20 m²/L for mechanical application.
(3) Once the primer has surface-dried (typically after 5–10 minutes), you can start wrapping the tape.
(4) Backfilling into the trench: Once the quality inspection and acceptance are passed, you may proceed with backfilling into the trench.
III. Transportation and Storage:
(1) During transportation, the tape should be protected from exposure to sunlight, rain, and compression that could cause deformation.
(2) If the material is exposed to freezing below 5℃ during transportation or storage, it must be stored at around 20℃ for 48 hours before construction can proceed.
(3) Store in a cool warehouse with a temperature range of 5–30°C and a relative humidity below 75%. The shelf life is 12 months. Keep away from heat sources and open flames.
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