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- 产品描述
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- Commodity name: COATED STEEL PIPE
ANTI-CORROSION STEEL PIPE MEANS STEEL PIPE WITH 3-LAYER POLYETHYLENE COATING AND EPOXY LINING MADE AS DIN30670-2024 OR GB/T23257-2017, WIDELY USED FOR UNDERGROUND BURRIED STEEL PIPE OR SUBMERGED LINE PIPES IN THE OIL, GAS, WATER AND INDUSTRIAL SECTORS.
ANTI-CORROSION STEEL PIPE MEANS STEEL PIPE WITH 3-LAYER POLYETHYLENE COATING AND EPOXY LINING MADE AS DIN30670-2024 OR GB/T23257-2017, WIDELY USED FOR UNDERGROUND BURRIED STEEL PIPE OR SUBMERGED LINE PIPES IN THE OIL, GAS, WATER AND INDUSTRIAL SECTORS.
THE THREE LAYERS OF ANTI-CORROSION COATING ARE:
FIRST LAYER/PRIMER: FUSION-BONDED EPOXY (FBE)
INTERMEDIATE LAYER: ADEHSIVE POLYMER AND
TOP LAYER: HOT EXTRUDED POLYETHYLENE COATING LAYER
HSS (HEAT SHRINK SLEEVES) TO BE USED FOR THE PIPE FILD JOINTS CAN ALSO BE PROVIDED
PROCESS OF A 3LPE COATING SYSTEM:
GB/T 23257 DIN30670 Name Polyethylene coating for buried steel pipeline Polyethylene coatings of steel pipes and fittings-part 1:
Requirements and testing of factory-applied extruded coatings
Thickness Pipe size
DN
FBE
µm
Adhesive
µm
Min. thickness of PE
mm
G(general) S (strict) DN≤100 ≥120 ≥170 1.8 2.5 100<DN≤250 2.0 2.7 250<DN<500 2.2 2.9 500≤DN<800 ≥150 2.5 3.2 800≤DN≤1200 3.0 3.7 DN﹥1200 3.3 4.2 Pipe size
DN
FBE
µm
Adhesive
µm
Min. thickness of PE
mm
N(normal) V (increased) S DN≤100 ≥60 ≥140 1.8 2.5 Upon agreement 100<DN≤250 2.0 2.7 250<DN<500 2.2 2.9 500≤DN<800 2.5 3.2 DN≥800 3.0 3.7 Cutback DN≤600: length of cutback≤150
DN﹥600: Length of cutback: 150 ± 20mm
Epoxy and adhesive layers at least 80mm from the welding bevel, with at least 20mm strip from cutback of PE coating.
DN≤600: length of cutback≤150
DN﹥600: Length of cutback: 150 ± 20mm
Epoxy and adhesive layers at least 80mm from the welding bevel, with at least 20mm strip from cutback of PE coating.
Anti-corrosion coatings properties Peel strength: N/cm 20 ºC±5 ºC: ≥70
60 ºC±5 ºC: ≥35
Type N: 23 ºC: 45 N/cm; 50 ºC: 20 N/cm
Type S: 23 ºC: 70N/cm; 70 ºC: 30 N/cm
Cathodic disbandment 65 ºC, 48h: ≤5mm
Max. service temperature, 30d: ≤15mm
23 ºC/28d or 60 ºC/2d: max. 7mm Holiday detection No discharges No discharges Elongation at break ≥600% 23 ºC±2 ºC: Min. 300% Impact resistance ≥8 J/mm Type N: ≥5
Type s: ≥7 J/mm
Indentation Resistance 23 ºC: ≤0.2mm
60 ºC or 80 ºC: ≤0.3mm
Type N: 23 ºC: max. 0.2mm, 50 ºC: max. 0.3mm
Type S: 23 ºC: max. 0.2mm, 50 ºC: max. 0.4mm
Electrical coating resistance ≥1×1013Ω·m ≥108Ωm2 UV resistance 336h: ≥80% ⊿MFR±35% Thermal ageing resistance 100 ºC, 4800h: ≤35% ⊿MFR±35% Bending resistance -30 ºC, 2.5 º: no crack in the PE layer Hot water dipping resistance 80 ºC, 48h: edge curling depth: average ≤2mm and the max. value≤3mm
Introduce
Hebei Senhai Pipeline Co., Ltd. is one professional manufacturer of ERW, SAW, SMLS steel pipes, as per standards of ASTM, ASME, API5L, EN, BS, DIN, GOST, GB, etc. Senhai Pipeline is located in Cangzhou City, which is the famous “Hometown of Pipes and Fittings” in China, about 120km away from Tianjin Seaport and Airport, and 180km from Beijing. Senhai is so professional in producing large dia. thick wall thickness steel pipes by LSAW.
Customized Process
Goods will be strictly tested before delivery, please check carefully after receiving the goods, if there is any problem, please contact us in time.
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FAQ
What kind of company is Hebei Senhai Pipeline Co., Ltd.?
Founded in 2013 and based in Cangzhou, Hebei – China’s well-known “Hometown of Pipes and Fittings”, we are a professional manufacturer and supplier of steel pipes and pipeline accessories. Conveniently located near Tianjin Port and major transportation routes, we specialize in ERW, SAW, and seamless steel pipes, along with pipe fittings and flanges, complying with API 5L, API 5CT, ASTM, EN, GB and other international standards.
What are your main products?
Our core products include seamless steel pipes, straight seam welded pipes, large-diameter thick-wall pipes, butt-welding fittings, forged flanges, and anti-corrosion pipeline products. They are widely used in oil & gas transmission, petrochemical engineering, water supply, drainage, and construction projects.
Do you accept customized orders and what’s your MOQ?
Yes, we provide customized production for size, material grade, wall thickness, length, and anti-corrosion coating. We support small-batch trial orders and flexible MOQ to meet project-specific demands.
What quality certifications and quality control do you have?
We implement strict quality management covering raw material inspection, production process control, and finished product testing. Our products meet multiple international standards, and we issue material test certificates (MTC) to ensure stable performance under high pressure and harsh environments.
How to get a quotation and arrange delivery?
To provide an accurate quote, please send specifications, quantity, destination port, and special requirements. We offer FOB, CFR, CIF terms and cooperate with reliable logistics partners for fast, safe delivery to North America, South America, Eastern Europe, and other regions.
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Shop 409, Building 8, Yihe Plaza, West Jiefang Road, Yuncheng District, Cangzhou City
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