High Pressure Resistance GOST CT3kp-2 CT3kp-3 CT3kp-4 Plastic Coated Steel Pipe
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Product Highlights
- High Pressure Resistance: Seamless steel base with epoxy/PE coating ensures superior pressure performance.
- Dual Coating Technology: Internal epoxy and external PE/3PE/3PP coatings for maximum corrosion resistance.
- Customization Support: OEM/ODM available for material, specification, logo, package, and connection methods.
- Wide Application Range: Suitable for municipal, chemical, oil pipelines, water supply, and mining industries.
- Flexible Connection Options: Supports welding, socket, flange, and clamp connections for easy installation.
- Certified Quality: Products pass CE, BV, ISO, and other international standards with strict testing.
- Manufacturer Direct: Direct factory supply with 16 years export experience and 300 production lines.
Product Attributes
- Customization
- Available
- Compound Material
- Steel Plastic Composite Pipe, Steel Plastic Composite Pipe
- Material
- PEX-Al-PEX, Pex-Al-Pex
- Model NO.
- DH-SWSP-FFGG
- Installation and Connection
- Welding/Socket/Flange, Welding/Socket/Flange
- Technology of Plastic Composite Pipe
- Internal and External Coating, Internal and External Coating
- Base Pipe of Plastic Composite Pipe
- Seamless Steel Tube, Seamless Steel Tube
- Internal Coating Materials of Plastic Composite Pipe
- Epoxy Resin Coating Steel Pipe, Epoxy Resin Coating Steel Pipe
- Plastic Composite Pipe Coating Form
- Inner and Outside Coating, Inner and Outside Coating
- Plastic Composite Pipe Model
- GS-Ep-CS-Ep, GS-Ep-CS-Ep
- Steel Skeleton PE Pipe Use
- Municipal, Chemical, Oil Pipeline, Industrial&Municipal Water Applications, Municipal, Chemical, Oil Pipeline, Industrial&Municipal Water Applications
- Steel Plastic Composite Pipe Model
- GS-—X-SP-T-EP, GS-—X-Sp-T-Ep
- Type
- Welded
- Technique
- Saw
- Surface Treatment
- Antiseptical
- Usage
- Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
- Section Shape
- Round
- Connection Method
- Flexible Socket Connection
- Composite Process
- Inner Expoxy Outsaide Polyethylene Steel Pipe
- Coating Form
- Inner and Outside Coating
- Cathodic Strippin
- (65±3℃, 48h, -1.5V) ≤
- Bending Resistance
- Strengthen Level:1.5°, No Crack
- Stamping Resistance
- Strengthen Level:15j, No Leakage
- Fracture Surface Interstice
- 1-3 Level
- Adhesion Strength
- 1-2 Level
- Anti-Scratch(20℃±3℃)
- Strengthen Level(50kg):≤500μm, No Leakage
- Transport Package
- Standard Package
- Specification
- 6m, 12m or Upon your request
- Trademark
- DHPI
- Origin
- Shandong, China
- HS Code
- 3917330000
- Production Capacity
- 50000000 Tons /Year
Product Images of High Pressure Resistance GOST CT3kp-2 CT3kp-3 CT3kp-4 Plastic Coated Steel Pipe
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Product Description
Th Internal Epoxy External Double-layer Epoxy Coated Pipe
The coated composite steel pipe is made of steel pipe as the base pipe,thermal setting epoxy resin poweer and polyethylene as the coating material,and is made by thermal processing and coating process.Plastic coated composite steel pipe intergrates the superior mechanical properties of steel and the suoerior chemical corrosion resistance of polymer materials,greatly extends the service life of steel pipe,with corrosion resistance,not easy to scale,high pressure superior performance,is a new type of anti-corrosion pipeline.
1. 2 powder coating production lines, 12 twin-screw extruders, , with perfect powder coating, polyethylene material modification R & D production capacity
2. The largest variety of powder anticorrosion process manufacturers, with: suction coating, spraying, rolling coating, dip coating and other methods.
3. The only one in the country set large-caliber steel pipe, anti-corrosion processing, anti-corrosion materials allproduced in one enterprise.
The High-quality steel pipe is used as the base pipe,and a layer of expoxy resin material is coated on the inner and outer surfaces of the pipe through the thermal fusion process.
| Nominal Diameter/ mm | Inner Coating Layer /mm | Outer coating layer,mm | |
| Ordinary level | Strengthen level | ||
| DN ≤65 | >0.3 | >0.6 | >0.8 |
| 65≤DN≤150 | >0.35 | >0.8 | >1.0 |
| 150≤DN≤300 | >0.35 | >0.8 | >1.2 |
| 300≤DN≤800 | >0.4 | >1.0 | >1.3 |
| 800≤DN≤1200 | >0.45 | >1.2 | >1.8 |
| 1200≤DN≤3600 | >0.45 | >1.5 | >1.8 |
Epoxy & Plastic coated anti-corrosion steel pipe can adopt a variety of anticorrosive solutions to meet the needs of different working conditions. Applicable to buried, trenchless traction, pipe jacking and open-air applications and other environmental conditions, the following anti-corrosion solutions can be used respectively:
- Burried:inner epoxy outer PE,inner epoxy outer 3PE,inner epoxy outer 3PP,inner & outer epoxy coated
- Pipe Jacking:inner epoxy outer 3PE,inner epoxy outer3PP,inner epoxy outer double layer epoxy
- Trenchless traction:inner epoxy outer 3PE,inner epoxy outer 3PP,inner epoxy outer double layer epoxy
- Open-air application:inner epoxy outer anti-uv coated
Double-layer epoxy inner and outer layers are both epoxy resin-based resin coating, the two are compatible with each other, patching using solvent-free epoxy coatings, good compatibility.
The double-layer epoxy coating has good compatibility with the cathodic protection and will not shield the cathodic prot.
The coating material is made of epoxy resin with high molecular weight, which has good flexibility and excellent bending
The outer layer is modified epoxy coating with special scratch material, which has excellent scratch resistance.
Double-layer epoxy anticorrosive steel pipe can withstand a maximum temperature of 110ºC.
2.Internal corrosion layer: the molten epoxy powder is generally used as the internal corrosion layer,because the epoxy resin coating has strong adhesion,is not easy to fall off,smooth surface,not easy to scale to improve the delivery efficiency.
3.External preservative layer:preservative layer of molten epoxy powder,polyethylence powder or other matertials.
| 1.Socket Connection | 2.Flange Connection | 3.Clamp Connection |

About Us
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the hometown of Confucius.Is an engineering pipeline manufacturer, pipeline engineering service provider and pipeline engineering general contractor with the main business of four categories of functional and customized pipelines: special pipelines for rainwater and sewage diversion, special pipelines for municipal areas, special pipelines for industrial and mining areas, and special pipelines for national key engineering projects. The company has built up an industrial ecosystem with the participation of design institutes, financial institutions, port logistics, construction units, upstream and downstream enterprises, etc. The company is committed to becoming a global leading pipeline system comprehensive solution provider by making intelligent pipelines change human life and constant safety of pipeline transportation
Donghong has more than 200 R&D personnel and more than 100 patents. Relying on national enterprise technology center, national CNAS laboratory, academician expert workstation, post-doctoral workstation and other national technology R&D platforms, Donghong deepens the research on digitalization, informatization and intelligentization of pipeline engineering and leads the development of engineering pipeline industry. Relying on national technology research and development platforms such as National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, Post-doctoral Workstation, etc., Donghong deepens the research on the digitization, informatization and intelligence of pipeline engineering, leads the development of engineering pipeline industry, and serves the national key strategic projects and people's livelihood projects, such as South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, standardized farmland, urban and rural water supply integration, Liren gas, centralized heat supply, etc. The company has been engaged in national key strategic projects and people's livelihood projects.

1. Is your product meets the international standard ?
Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
2. What kind of service do you offer ?
As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
3. Do you support OEM/ODM service?
Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
4. What's your terms of payment?
T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI245429". Items marked "" are certified.
Company Profile
Shandong Donghong Pipe Industry Co., Ltd. ( Donghong Pipe Industry, stock code: 603856) is headquartered in the hometown of Confucius - Qufu, China, and is an engineering pipeline manufacturer, pipeline engineering service provider and general contractor of pipeline engineering for all kinds of high polymer plastic pipelines, modified plastic composite pipes, heavy Donghong is a manufacturer of engineering pipelines, pipeline engineering service provider and general contractor of pipeline engineering with various types of high polymer plastic pipes, modified plastic composite pipes, heavy anti-corrosion metal pipes, energy-saving thermal insulated pipelines, connecting fittings and the application of new materials as its main business. Relying on the national enterprise technology center, the company integrates upstream and downstream ecological resources, deepens the research on digitalization, informatization and intelligentization of pipeline engineering, integrates intelligent pipeline into human life, and devotes itself to becoming a global leading comprehensive solution provider of pipeline system.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- No. 1 Donghong Road, Qufu City, Jining, Shandong, China
-
Plant Area
- 60000 square meters
-
Number of Employees
- 1687
-
Registered Capital
- 256,900,600 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Qingdao Port
-
Minimum Order Quantity
- 1
-
Supply Chain Partners
- 73
Our Production Capability & Technical Expertise
-
Main Products
- Steel wire reinforced PE composite pipe, HDPE pipe, PE pipe, steel pipe
-
Production Lines
- 300
-
Production Machines
- Mixing machine, HDPE pipe production line, Steel wire reinforced PE composite pipe production line, Steel pipe production line
-
QA/QC inspectors
- 32 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 66 people
-
Traceability of Raw Materials
- Yes
-
Test Reports for Raw Materials
- Others
-
Own Brand
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2008-01-21
-
Export Year
- 16 Years
-
Main Markets
- Southeast Asia/ Mideast, East Asia(Japan/ South Korea), Australia, Domestic
-
Repeat Buyers Choice
- 80%~100%
-
Number of Foreign Trading Staff
- 5
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Product Certification
- CE, Others
-
Cooperated with Fortune 500
- Yes
FAQ
- Does your product meet international standards?
- Our products pass CE, BV, ISO, and other certifications, with figures exceeding standard requirements. We can also test according to specific national standards upon request.
- What services do you offer?
- We provide pipe products, fittings, packaging, and shipping. Additionally, we offer project consulting, system solutions, design suggestions, contractor services, repair services, and free maintenance guidance.
- Do you support OEM/ODM services?
- Yes, we offer customization in material, specification, logo, package, and connection methods. Our professional team also provides solution suggestions for specific projects with successful case studies.
- What are your terms of payment?
- We accept T/T or L/C at sight.
- How do you guarantee product quality?
- We welcome customer visits to inspect goods. We provide strict testing before orders, dispatch samples for customer testing before bulk production, and conduct 100% inspection on finished products.
- What is the minimum order quantity?
- The minimum order quantity is 1.
- What is the lead time for production?
- The average lead time is within 15 workdays for both peak and off-peak seasons.
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