Single-layer pipe
Single-layer pipe - industrial steel pipe
High-density polyethylene jacket tube is widely used in oil pipelines, gas pipelines, urban heating pipes
HDPE pipe ideal suitable for many different applications, including municipal, industrial, energy, geothermal, landfill and so on. HDPE pipe strength, durability, flexibility, weight of light welding after the high density polyethylene to zero leakage rate, because the welding process formed a whole HDPE system.
High-density polyethylene tubing is relatively environmentally friendly because it is non-toxic, corrosion-resistant and chemical-resistant, has long design life, and because of the flexibility, the deletion is suitable for the trench-free installation method.
Manufacture of stent should be added antioxidants, UV stabilizers and carbon black, etc. Polyethylene jacket tube easy to aging, such as open storage tarpaulin and other items appropriate to cover, dumps should stay away from high heat and fire, anti-corrosion steel pipe made after the ban exposure, sudden cold, or polyethylene jacket tube easy to crack, the impact product performance and service life.
Coating Material : Epoxy Powder, Adhesion, Polyethylene Or Polypropylene, Cement Inside
Standard: API 5L (PSL1, PSL2); GB/T 9711.1;
Grade: Gr. B, X42, X46, X52, X60, X65, X70, X80; Q235B; Gr. C;
Seam: SAW, SSAW; HSAW
Inspection: Hydraulic Testing, Eddy Current, Infrared Test;
The thired party, SGS, BV, can be accepted.
Certificate: Certificate: API 5L, API 5CT. ISO 9001; CE and so on.
Resistant to chemical corrosion, resistance to cathodic disbondment resistance, mechanical damage to properties.
Industries: Agricultural (irrigation), chemical; dredging, fertilizers, gas distribution, general industrial, landfill reclamation, metals extraction, mining oil and gas production, power generation, pulp and paper, sewage and water distillation.
Special services: Potable water supply; hazardous wastes, duct and fire protection.
Applications: Submarine pipelines, acid lines, cold bed methane drainage, corrosive wastes, de-watering, process waterlines, drainage lines, fiber optic innerduct, fly ash disposal, relining salt water intakes and sewer lines.
Some interesting applications are further detailed.
Submarine pipelines: This application is of special interest for HDPE pipes. By virtue of its flexibility, an HDPE pipe automatically accommodates itself within its minimum radius limits to the configuration of the terrain. Submarine pipelines are used as pressure lines e.g. drinking water lines, gravity flow lines and electrical cable conduits.
A submarine installation may consist of one or more pipelines laid side by side or grouped together in one pipe bundle. Submarine pipelines are installed by one of three different methods, depending on the stretch of water to be crossed, the nature of the waterway bed and safety requirements.
HDPE lined steel pipe slightly larger than the outer diameter of tube technology is the main channel diameter HDPE liner, after necking, making cross-section smaller than the cross-sectional area of the main channel, in the role of traction quickly insert the main channel.
Rely on their memory characteristics HDPE liner or with pressure and temperature to rebound swelling HDPE liner diameter, HDPE liner attached to the outer wall of the main channel interference inner wall of the tube to form a solid tube.
HDPE Lined Pipe Fittings, and short straight sections of steel pipe are often needed to terminate the pipeline, or for use in areas where larger radius bends cannot be accommodated.
The steel pipe spools, or fittings, are fabricated with weld neck flanges to connect with the HDPE-lined steel pipeline.
Some anti-corrosion methods include painting, covering, and electroplating.
Anti-corrosion coatings act as a barrier layer that prohibits or slows down the formation of corrosion on the underlying metal surface of the carbon steel pipe. By preventing external corrosion with the use of either single or multi-layer anti-corrosion coatings, it ensures precious natural resources and other products reach their destination safely and efficiently.
Anti-corrosion steel pipe is processed through the preservation process, which can effectively prevent or slow down the process in the transport and use of chemical or electrochemical corrosion reaction of steel pipe.
Steel surface treatment is mainly for anti - rust, and the following is the anti - rust process:
First step: Clean the steel surface using a cleaning solvent emulsion. This is to remove oil, grease, dust, lubricants, and similar organic matter. However, it cannot remove rust, oxides, or soldering agents on the steel surface.
Second step: Use rust - removing tools. You need to use a wire brush to remove loose or flaking oxides, rust, and slag. To achieve the desired rust - removing effect, the type of abrasive should be selected based on the original corrosion degree of the steel surface, the required surface roughness, and the coating. For an epoxy layer or two - or three - layer polyethylene coating, using a mixed abrasive of grit and steel shot for blasting is more likely to achieve the desired effect.
Third step: Perform pickling. Generally, chemical and electrolytic pickling are two methods. Using only chemical pickling can cause pipeline corrosion. Although chemical cleaning can achieve a certain level of surface cleanliness and roughness, it causes some environmental pollution.
The three-layer PE (Polyethylene) and PP (Polypropylene) coating process is designed to enhance the corrosion resistance, durability, and mechanical strength of steel pipes.
Finally, emphasize the importance of surface treatment in production and strictly control the process parameters during anti - rust treatment.
When it comes to transporting precious natural resources or other essential products, the integrity of the pipes used plays a pivotal role. Carbon steel pipes, widely utilized in various industries, are susceptible to corrosion over time. This is where anti-corrosion coatings step in as the frontline defense, ensuring the longevity and reliability of the pipes.
Anti-corrosion steel pipe is processed through the preservation process, which can effectively prevent or slow down the process in the transport and use of chemical or electrochemical corrosion reaction of steel pipe.
Anti - corrosion coatings serve as a protective shield against the relentless forces of corrosion that can compromise the structural integrity of carbon steel pipes. These coatings act as a robust barrier layer, strategically designed to inhibit or significantly slow down the formation of corrosion on the metal surface.
In the realm of carbon steel pipes, the battle against corrosion is ongoing. Anti - corrosion coatings emerge as the frontline warriors, safeguarding the structural integrity of pipes and ensuring that resources and products reach their destinations without compromise.
To improve anticorrosion performance and adhesion, an additional layer of epoxy primer is sprayed onto pipe surfaces prior to the adhesive layer and Polyethylene top - layer application. Three Layer Polyethylene is suitable for service temperatures from 60°C to 80°C (85°C peaks). Typical coating thickness is from 1 - 2 mm to 3 - 5 mm.
If a wider service temperature range and high stiffness is required, adhesive and top layers, applied over the primer layer, are based on polypropylene instead of polyethylene. Three Layer Polypropylene is suitable for service temperatures up to 135 °C (140°C peaks). Typical coating thickness is from 1 - 2 mm to 3 - 5 mm.
Three - Layer applications involve a thermoplastic coating applied to steel pipelines as a form of anticorrosion protection. This mechanical resistance is appropriate when the risk of particularly severe coating damages exists. The Three - Layer process involves several steps. First, the pipe surface is blast - cleaned to remove any external residue from the mill or storage. It is then heated and sprayed with a Fusion Bond Epoxy (FBE) primer followed by the application of an adhesive copolymer and polyolefin polymers that are wrap - extruded, one over the other.
Pipeline coating is the most consistent and successful solution for protecting ERW pipes from corrosion, from moisture, other harmful chemicals.
Therefore pipe anti-corrosion layer is an important barrier to prevent soil erosion. A well-known foreign scholar put forward" 3PE france protective layer", so far, anti-corrosion methods is widely used.
1. Increased Flow Capacity – A coating on pipes helps provide a smoother surface thus improving gas and liquid flow within pipes.
2. Reduced Cost – The pipeline coating increases the pipes durability so they can be deployed with minimum maintenance cost even in the harshest environments.
3. Lower energy usage – Various studies have shown that pipelines that are internally coated use less energy for pumping and compression of products through pipes. This helps in increased saving over time.
4. Clean delivery of products – The inhibitors used for the protection products can also be minimized by the use of coated pipes for delivery of products.
Thus, coating of pipelines can help you in reducing your maintenance cost and at the same time providing a corrosion free reliable protection.
The basic principles of urban gas pipeline coating selection:
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Casting | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80 |
| Tubing | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80, H40 |
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Line Pipes | API 5L | Ø60.3~273.1 x WT2.77~12.7 | A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80 |
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Electric-Resistance-Welded Steel Pipes | ASTM A135 | Ø42.2~114.3 x WT2.11~2.63 | A |
| Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes | ASTM A178 | 42.2-114.3 x 2.11-2.63 | A, C, D |
| ERW and Hot-dip Galvanized Steel Pipes | ASTM A53 | Ø21.3~273 x WT2.11~12.7 | A, B |
| Pipes for Piling Usage | ASTM A252 | Ø219.1~508 x WT3.6~12.7 | Gr.2, Gr.3 |
| Tubes for General Structural Purpose | ASTM A500 | Ø21.3~273 x WT2.11~12.7 | Gr.2, Gr.3 |
| Square Pipes for General Structural Purpose | ASTM A500 | 25 x 25~160 x 160 x WT1.2~8.0 | Carbon Steel |
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Threaded Steel Pipes | DIN 2440 | Ø21~164 x WT2.65~4.85 | Carbon Steel |
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Screwed and Socketed Steel Tubes | BS 1387 | Ø21.4~113.9 x WT2~3.6 | Carbon Steel |
| Scaffolding Pipes | EN 39 | Ø48.3 x WT3.2~4 | Carbon Steel |
| Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
|---|---|---|---|
| Carbon Steel Tubes for General Structure Purpose | JIS G3444 | Ø21.7~216.3 x WT2.0~6.0 | Carbon Steel |
| Carbon Steel Tubes for Machine Structure Purpose | JIS G3445 | Ø15~76 x WT0.7~3.0 | STKM11A, STKM13A |
| Carbon Steel Pipes for Ordinary Piping | JIS G3452 | Ø21.9~216.3 x WT2.8~5.8 | Carbon Steel |
| Carbon Steel Pipes for Pressure Service | JIS G3454 | Ø21.7~216.3 x WT2.8~7.1 | Carbon Steel |
| Carbon Steel Rigid Steel Conduits | JIS G8305 | Ø21~113.4 x WT1.2~3.5 | G16~G104, C19~C75, E19~E75 |
| Carbon Steel Rectangular Pipes for General Structure | JIS G3466 | 16 x 16~150 x 150 x WT0.7~6 | Carbon Steel |
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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