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Carbon Steel Pipe Cap

Carbon Steel Pipe Cap

A Carbon Steel Pipe Cap is a pipe fitting designed to cover the open end of a pipe. Its primary function is to:

  • Block the flow of liquids or gases.
  • Protect the pipe ends from mechanical damage or corrosion.
  • Ensure safety during pipeline maintenance or repair.

The design typically features a round or elliptical shape with a smooth surface. Carbon steel, known for its excellent mechanical properties, ensures these caps can withstand high stresses, making them reliable in demanding environments.

Types of Carbon Steep Pipe Cap

carbon-steel-pipe-cap

Carbon Steel Butt Weld Cap

carbon-steel-threaded-cap

Carbon Steel Threaded Pipe Caps

carbon-steel-socket-weld-cap

Carbon Steel Socket Weld Caps

Carbon Steel Pipe Cap Dimensions

CS End Cap Dimension Chart (in lbs)

Inch.MMHeight
DE
1/21521,3425,40
3/42026,6731,75
2533,4038,10
1 1/43242,1638,10
1 1/24048,2638,10
25060,3238,10
2 1/26573,0238,10
38088,9050,80
3 1/290101,6063,50
4100114,3063,50
5125141,3076,20
6150168,2788,90
8200219,07101,60
10250273,05127,00
12300323,85152,40
14350355,60165,10
16400406,40177,80
18450457,20203,20
20500508,00228,60
22550558,80254,00
24600609,60266,70
28700711,20266,70

CS Stub End Dimensions Chart (in lbs)

NOMINAL PIPE SIZELAP DIAMETEROUTSIDE DIAMETERLONG PATTERN LENGTHSHORT PATTERN LENGTHRADIUS
Inch.AOD MinOD MaxLLR
1/23522.820.576513
3/44328.125.976513
1513532.6102513
1 1/46443.641.4102515
1 1/27349.947.5102516
29262.459.5152648
2 1/210575.372.2152648
312791.388.11526410
3 1/2140104100.81527610
4157116.7113.51527611
5186144.3140.52037611
6216171.3167.52038913
8270222.1218.320310213
10324277.2272.325412713
12381328323.125415213
14413359.9354.830515213
16470411405.630515213
1853346245630515213
2058451450730515213
2264156555830515213
2469261660930515213

Carbon Steel Pipe Cap Weight

CS End Cap Weight Chart (in lbs)

Nominal Pipe Size (NPS)Schedule 40 (lbs)Schedule 80 (lbs)Schedule 160 (lbs)
1/2″0.160.230.30
3/4″0.230.320.42
1″0.300.450.60
1 1/4″0.400.600.80
1 1/2″0.500.751.00
2″0.701.051.40
2 1/2″1.051.602.10
3″1.402.102.80
4″2.003.004.00
5″2.704.005.30
6″3.505.207.00
8″5.007.5010.00
10″7.5011.2014.90
12″10.0015.0020.00
14″12.5018.7025.00
16″15.5023.3031.00
18″19.0028.5038.00
20″23.0034.5046.00
24″30.0045.0060.00
28″37.5056.0075.00

CS 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″0.8400.6251.380.125
3/4″1.0500.8751.500.125
1″1.3151.0501.750.125
1 1/4″1.6601.3752.000.125
1 1/2″1.9001.5002.250.125
2″2.3752.0002.500.125
2 1/2″2.8752.5002.750.125
3″3.5003.0003.000.125
4″4.5003.5003.500.125
5″5.5634.5004.000.125
6″6.6255.5004.500.125
8″8.6257.0005.000.125
10″10.7508.6255.500.125
12″12.75010.7506.000.125
14″14.00012.7506.500.125
16″16.00014.0007.000.125
18″18.00016.0007.500.125
20″20.00018.0008.000.125
24″24.00022.0008.500.125
28″28.00026.0009.000.125

Carbon Steel Pipe Cap Tolerance

CS Cap Tolerance

ParameterTolerance
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 FinishFree from defects such as cracks, dents, or visible seams
Marking ToleranceLegible and durable markings in accordance with ASME, ANSI, or applicable standards

Manufacturing Process

  1. Material Selection: High-quality carbon steel billets or plates are chosen based on the required grade.
  2. Cutting: Material is cut into the desired size and shape using advanced machinery.

  3. Shaping: The cut pieces are forged or pressed into the shape of a cap.

  4. Heat Treatment: To enhance strength and durability, caps undergo annealing, quenching, or normalizing.

  5. Surface Finishing: Anti-rust coatings or galvanization are applied.

  6. Inspection: Each cap undergoes rigorous quality checks to ensure dimensional accuracy and mechanical properties.

Application

  • Oil and Gas Pipelines
  • Water Treatment Plants
  • Petrochemical
  • Construction
  • Pressure Vessels
  • Phosphate Mining

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