ASTM A978 Plastic Coated Steel Pipe: Pre-Coated Polyethylene Lined Composite Rib Welded Steel Pipe
Material
ASTM A978 specifies the requirements for plastic-coated steel pipes, particularly those that are pre-coated with polyethylene. This composite rib welded steel pipe is designed to provide enhanced durability and corrosion resistance, making it suitable for various applications in harsh environments.
Specification
The ASTM A978 standard outlines the specifications for the manufacturing process, dimensions, and performance characteristics of plastic-coated steel pipes. The pipes must meet specific criteria for coating thickness, adhesion, and overall structural integrity.
Key Features
- Corrosion Resistance: The polyethylene coating provides excellent protection against corrosion, extending the lifespan of the pipe.
- Durability: The composite rib design enhances the mechanical strength of the pipe, making it suitable for high-pressure applications.
- Lightweight: Compared to traditional steel pipes, the plastic-coated variant is lighter, facilitating easier handling and installation.
- Versatility: Suitable for various applications, including water distribution, sewage systems, and industrial uses.
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.05 - 0.25 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.05 |
| Silicon (Si) | 0.10 - 0.40 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
| Yield Strength (min) | 250 MPa |
| Tensile Strength (min) | 400 MPa |
| Elongation | 20% (min) |
| Hardness | 120 HB (max) |
Steel Grade
The steel grade used in ASTM A978 pipes typically falls under the standard structural steel grades, such as ASTM A53 or ASTM A106, depending on the specific application and requirements.
Application
ASTM A978 plastic-coated steel pipes are widely used in:
- Water and Wastewater Systems: For transporting potable water and sewage.
- Industrial Applications: In chemical processing and manufacturing.
- Agricultural Irrigation: For efficient water distribution in farming.
Possible Alternative Grades
While ASTM A978 is a preferred choice for many applications, alternative grades may include:
- ASTM A53: Standard specification for pipe, suitable for welding and bending.
- ASTM A106: Seamless carbon steel pipe for high-temperature service.
- ASTM A795: Standard specification for black and hot-dipped galvanized welded and seamless steel pipe for fire protection use.
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trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
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The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
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Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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ASTM A978 Plastic Coated Steel Pipe Pre-Coated Polyethylene Lined Composite Rib Welded Steel Pipe Images
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