Steel Pipe Cap
Steel Pipe Cap
A steel pipe cap is a type of pipe fitting designed to cover the end of a pipe. It is typically welded or screwed onto the pipe to provide a tight seal. Pipe caps are manufactured from various materials, including carbon steel, stainless steel, and alloy steel, to meet different industrial requirements.
Steel pipe caps are an essential component in the piping industry, offering robust solutions to seal the ends of pipes securely. These caps serve both functional and protective purposes, ensuring the integrity of pipelines and safeguarding them against external factors such as dirt, moisture, and mechanical damage.
Materials Used in Steel Pipe Caps
Steel pipe caps are available in a variety of materials to suit diverse applications and environments. The most common materials include:
1. Carbon Steel:
- High strength and durability.
- Suitable for high-pressure applications.
- Common Grades: ASTM A234 WPB, ASTM A105.
2. Stainless Steel:
- Excellent resistance to corrosion and oxidation.
- Ideal for chemical and marine environments.
- Common Grades: 304, 316, 316L.
3. Alloy Steel:
- Superior strength and toughness.
- Performs well under extreme temperatures and pressures.
- Common Grades: ASTM A182 F11, F22.
4. Duplex and Super Duplex Stainless Steel:
- High corrosion resistance with enhanced mechanical strength.
- Suitable for aggressive environments.
5. Nickel Alloys:
- Exceptional resistance to heat and corrosion.
- Used in high-performance applications.
Technical Specifications
Size Range:
- From 1/2” to 28” in diameter.
Wall Thickness:
- Schedule 10, Schedule 20, Schedule 40, Schedule 80, and higher.
Pressure Rating:
- Class 150 to Class 2500, depending on material and design.
Steel Pipe Cap Dimensions
End Cap Weight Chart (in lbs)
| Nominal Pipe Size (NPS) | Schedule 40 (lbs) | Schedule 80 (lbs) | Schedule 160 (lbs) |
|---|---|---|---|
| 1/2″ | 0.16 | 0.23 | 0.30 |
| 3/4″ | 0.23 | 0.32 | 0.42 |
| 1″ | 0.30 | 0.45 | 0.60 |
| 1 1/4″ | 0.40 | 0.60 | 0.80 |
| 1 1/2″ | 0.50 | 0.75 | 1.00 |
| 2″ | 0.70 | 1.05 | 1.40 |
| 2 1/2″ | 1.05 | 1.60 | 2.10 |
| 3″ | 1.40 | 2.10 | 2.80 |
| 4″ | 2.00 | 3.00 | 4.00 |
| 5″ | 2.70 | 4.00 | 5.30 |
| 6″ | 3.50 | 5.20 | 7.00 |
| 8″ | 5.00 | 7.50 | 10.00 |
| 10″ | 7.50 | 11.20 | 14.90 |
| 12″ | 10.00 | 15.00 | 20.00 |
| 14″ | 12.50 | 18.70 | 25.00 |
| 16″ | 15.50 | 23.30 | 31.00 |
| 18″ | 19.00 | 28.50 | 38.00 |
| 20″ | 23.00 | 34.50 | 46.00 |
| 24″ | 30.00 | 45.00 | 60.00 |
| 28″ | 37.50 | 56.00 | 75.00 |
Stub End Dimensions Chart (in inches)
| Nominal Pipe Size (NPS) | D1 (Outside Diameter) | D2 (Diameter of Stub End) | L (Length) | B (Flange Thickness) |
|---|---|---|---|---|
| 1/2″ | 0.840 | 0.625 | 1.38 | 0.125 |
| 3/4″ | 1.050 | 0.875 | 1.50 | 0.125 |
| 1″ | 1.315 | 1.050 | 1.75 | 0.125 |
| 1 1/4″ | 1.660 | 1.375 | 2.00 | 0.125 |
| 1 1/2″ | 1.900 | 1.500 | 2.25 | 0.125 |
| 2″ | 2.375 | 2.000 | 2.50 | 0.125 |
| 2 1/2″ | 2.875 | 2.500 | 2.75 | 0.125 |
| 3″ | 3.500 | 3.000 | 3.00 | 0.125 |
| 4″ | 4.500 | 3.500 | 3.50 | 0.125 |
| 5″ | 5.563 | 4.500 | 4.00 | 0.125 |
| 6″ | 6.625 | 5.500 | 4.50 | 0.125 |
| 8″ | 8.625 | 7.000 | 5.00 | 0.125 |
| 10″ | 10.750 | 8.625 | 5.50 | 0.125 |
| 12″ | 12.750 | 10.750 | 6.00 | 0.125 |
| 14″ | 14.000 | 12.750 | 6.50 | 0.125 |
| 16″ | 16.000 | 14.000 | 7.00 | 0.125 |
| 18″ | 18.000 | 16.000 | 7.50 | 0.125 |
| 20″ | 20.000 | 18.000 | 8.00 | 0.125 |
| 24″ | 24.000 | 22.000 | 8.50 | 0.125 |
| 28″ | 28.000 | 26.000 | 9.00 | 0.125 |
Steel Pipe Cap Weight
Steel Pipe End Cap Weight Chart (in lbs)
| Nominal Pipe Size (NPS) | Schedule 40 (lbs) | Schedule 80 (lbs) | Schedule 160 (lbs) |
|---|---|---|---|
| 1/2″ | 0.16 | 0.23 | 0.30 |
| 3/4″ | 0.23 | 0.32 | 0.42 |
| 1″ | 0.30 | 0.45 | 0.60 |
| 1 1/4″ | 0.40 | 0.60 | 0.80 |
| 1 1/2″ | 0.50 | 0.75 | 1.00 |
| 2″ | 0.70 | 1.05 | 1.40 |
| 2 1/2″ | 1.05 | 1.60 | 2.10 |
| 3″ | 1.40 | 2.10 | 2.80 |
| 4″ | 2.00 | 3.00 | 4.00 |
| 5″ | 2.70 | 4.00 | 5.30 |
| 6″ | 3.50 | 5.20 | 7.00 |
| 8″ | 5.00 | 7.50 | 10.00 |
| 10″ | 7.50 | 11.20 | 14.90 |
| 12″ | 10.00 | 15.00 | 20.00 |
| 14″ | 12.50 | 18.70 | 25.00 |
| 16″ | 15.50 | 23.30 | 31.00 |
| 18″ | 19.00 | 28.50 | 38.00 |
| 20″ | 23.00 | 34.50 | 46.00 |
| 24″ | 30.00 | 45.00 | 60.00 |
| 28″ | 37.50 | 56.00 | 75.00 |
Steel Pipe Stub End Dimensions Chart (in inches)
| Nominal Pipe Size (NPS) | D1 (Outside Diameter) | D2 (Diameter of Stub End) | L (Length) | B (Flange Thickness) |
|---|---|---|---|---|
| 1/2″ | 0.840 | 0.625 | 1.38 | 0.125 |
| 3/4″ | 1.050 | 0.875 | 1.50 | 0.125 |
| 1″ | 1.315 | 1.050 | 1.75 | 0.125 |
| 1 1/4″ | 1.660 | 1.375 | 2.00 | 0.125 |
| 1 1/2″ | 1.900 | 1.500 | 2.25 | 0.125 |
| 2″ | 2.375 | 2.000 | 2.50 | 0.125 |
| 2 1/2″ | 2.875 | 2.500 | 2.75 | 0.125 |
| 3″ | 3.500 | 3.000 | 3.00 | 0.125 |
| 4″ | 4.500 | 3.500 | 3.50 | 0.125 |
| 5″ | 5.563 | 4.500 | 4.00 | 0.125 |
| 6″ | 6.625 | 5.500 | 4.50 | 0.125 |
| 8″ | 8.625 | 7.000 | 5.00 | 0.125 |
| 10″ | 10.750 | 8.625 | 5.50 | 0.125 |
| 12″ | 12.750 | 10.750 | 6.00 | 0.125 |
| 14″ | 14.000 | 12.750 | 6.50 | 0.125 |
| 16″ | 16.000 | 14.000 | 7.00 | 0.125 |
| 18″ | 18.000 | 16.000 | 7.50 | 0.125 |
| 20″ | 20.000 | 18.000 | 8.00 | 0.125 |
| 24″ | 24.000 | 22.000 | 8.50 | 0.125 |
| 28″ | 28.000 | 26.000 | 9.00 | 0.125 |
Steel Pipe Cap Tolerance
| Parameter | Tolerance |
|---|---|
| Outside Diameter (OD) | ±1% of nominal OD or ±0.5 mm, whichever is greater |
| Wall Thickness (WT) | ±12.5% of specified wall thickness |
| Height (H) | ±1.5% of the nominal height or ±3 mm, whichever is greater |
| Out-of-Roundness | ≤1% of the nominal OD |
| End Preparation | ±1 mm for bevel length and ±2° for bevel angle |
| Surface Finish | Free from defects such as cracks, dents, or visible seams |
| Marking Tolerance | Legible and durable markings in accordance with ASME, ANSI, or applicable standards |
Advantages
Protection: Safeguards pipe ends against damage and contamination.
Versatility: Compatible with various pipe materials and applications.
Cost-Effectiveness: Long-lasting solution that minimizes maintenance costs.
Reliability: Ensures a secure seal, even in high-pressure environments.
Compliance: Adheres to international standards for safety and performance.
Application
- Oil and Gas Pipelines
- Water Treatment Plants
- Petrochemical
- Construction
- Pressure Vessels
- Phosphate Mining
