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.
Steel pipe caps are available in a variety of materials to suit diverse applications and environments. The most common materials include:
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
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
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
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
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
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.
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