Schedule 80 pipe (SCH 80 steel pipe) is a heavy wall carbon steel pipe designed for high-pressure and high-temperature piping systems. Compared with Schedule 40 pipe, SCH 80 pipe provides significantly thicker wall thickness, higher mechanical strength, and improved pressure resistance. It is widely used in oil and gas transmission, chemical processing, power generation, water supply systems, and industrial construction projects.
We supply ASTM A106 and ASTM A53 Schedule 80 steel pipes in seamless and welded forms, offering a full range of sizes, customized cutting, and global export support for engineering projects.
What is Schedule 80 Pipe?
Schedule 80 pipe refers to a pipe wall thickness classification under ASME standards. The higher the schedule number, the thicker the pipe wall and the stronger its pressure resistance.
SCH 80 pipes are designed for:
High-pressure systems
Harsh industrial environments
High-temperature applications
Schedule 80 Pipe Specifications
Standard Grades
ASTM A106 Grade B (Seamless high-temperature service)
ASTM A53 Grade B (General purpose structural & pressure)
API 5L (Oil & gas pipeline systems)
Manufacturing Types
Seamless steel pipe (higher strength, no weld seam)
Welded steel pipe (cost-effective, large diameter availability)
Schedule 80 Pipe Dimensions & Weight Chart
| NPS (inch) | OD (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|
| 1/2" | 21.3 | 3.73 | 1.27 |
| 1" | 33.4 | 4.55 | 3.24 |
| 2" | 60.3 | 5.54 | 8.63 |
| 4" | 114.3 | 8.56 | 24.68 |
| 6" | 168.3 | 10.97 | 43.16 |
Imperial Specification Summary
Schedule rating: SCH 80
Pressure class: High pressure
Temperature range: -29°C to 400°C (depends on grade)
Chemical Composition (ASTM A106 / A53)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.30 |
| Manganese (Mn) | 0.29–1.06 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Silicon (Si) | ≥ 0.10 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 20% |
Schedule 80 vs Schedule 40 Pipe
| Feature | Schedule 40 | Schedule 80 |
|---|---|---|
| Wall Thickness | Standard | Thicker |
| Pressure Rating | Medium | High |
| Strength | Normal | Higher |
| Cost | Lower | Higher |
| Application | General use | Heavy-duty systems |
Conclusion: SCH 80 is preferred for high-pressure industrial environments.
Applications of Schedule 80 Steel Pipe
Schedule 80 steel pipe is widely used in:
Oil & gas transmission systems
Chemical processing plants
High-pressure water pipelines
Power plant piping systems
Industrial boiler systems
Construction structural support
Advantages of SCH 80 Pipe
Excellent high-pressure resistance
Strong mechanical durability
Long service life
Suitable for harsh environments
Wide industrial compatibility
Inspection & Quality Assurance
All Schedule 80 steel pipes are strictly tested before delivery:
Ultrasonic testing (UT)
Hydrostatic pressure testing
Chemical composition analysis
Dimensional inspection
Third-party inspection (SGS / BV / TUV available)
Quality systems comply with:
ISO 9001 Quality Management System
ASTM / ASME international standards
Product Delivery Standards
We ensure stable global delivery with:
Standard export seaworthy packaging
Plastic caps for both ends
Steel strapping bundles
Waterproof wrapping
Customized marking & labeling
Delivery Options:
FOB / CIF / CFR / EXW
Packaging & Shipping
Bundle weight: 2–3 tons per package
Container loading: 20ft / 40ft
Loose cargo for large diameter pipes
Anti-rust oil coating available
FAQ – Schedule 80 Pipe
Q1: What is Schedule 80 pipe used for?
Schedule 80 pipe is used in high-pressure industrial systems such as oil, gas, chemical plants, and power generation.
Q2: Is Schedule 80 pipe stronger than Schedule 40?
Yes, SCH 80 pipe has thicker walls and higher pressure resistance than SCH 40.
Q3: Is SCH 80 pipe seamless or welded?
It can be both seamless and welded depending on application requirements.
Q4: What standard is Schedule 80 pipe?
Common standards include ASTM A106, ASTM A53, and API 5L.
Q5: What is the main advantage of SCH 80 pipe?
Its main advantage is high-pressure resistance and long service life.
Why Choose Us
Factory direct supply
Stable quality control system
Large inventory availability
Competitive pricing
Global export experience
Fast delivery support
Contact Us
If you are looking for reliable Schedule 80 steel pipe supplier, please contact us for quotation, technical support, and customized solutions.
We support OEM orders, project-based supply, and global delivery.
+8615769214734
office@dongmjd.com
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