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Pipe cap

Pipe caps act as protective device and are designed to protect pipe ends of various shapes.

We also use caps to cut off the transition and the connection treat can be butt weld,socket weld and thread conection according to use requirements. End caps are usually used for protecting the end of pipe and other fittings, so the shape are designed according to the shape of pipe line.

Key Specifications/Special Features:


Pipe Cap are used for connecting pipes of different diameters and find wide applications in various chemicals, construction industries, paper, cement & ship builders.

Pipe caps are widely well-known for the utmost output and outstanding results that it gives.

Size range:

  • Out diameter: 1/2″-60″ DN15-DN1500
  • Wall Thickness: sch10-80s
  • Pressure: SCH5 to SCH160v
  • Max. wall thickness: 200mm

Bending, squeezing, pressing, forging, machining and more

Manufacturing Standards of Buttweld Pipe End, Buttweld Pipe Cap

  • ASME: ANSI B16.9, ANSI B16.28, MSS-SP-43
  • DIN: DIN2605, DIN2615, DIN2616, DIN2617, DIN28011
  • EN: EN10253-1, EN10253-2
  • ASTM A403 – ASME SA403 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
  • ASME B16.9 Factory-Made Wrought Fittings Buttwelding
  • ASME B16.25 Buttwelding Ends
  • ASME B16.28 Wrought Steel Short Radius Elbows and Buttwelding Returns
  • MSS SP-43 Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications

Buttweld Pipe End Material Grades

  • Stainless Steel Pipe Cap ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
  • Carbon Steel Pipe Cap ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
  • Low Temperature Carbon Steel Pipe Cap ASTM A420 WPL3, A420 WPL6
  • Alloy Steel Pipe Cap ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
  • Duplex Pipe Cap ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462
  • Nickel Alloy Pipe Cap ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 )

Mark and packing

CAPS: Deep Drawing method

One of the most common manufacturing methods for caps, where plate is cut out in a circle and formed by deep drawing.

Deep drawing is the manufacturing process of forming sheet metal stock, called blanks, into geometrical or irregular shapes that are more than half their diameters in depth. Deep drawing involves stretching the metal blank around a plug and then moving it into a moulding cutter called a die.

A drawing press can be used for forming sheet metal into different shapes and the finished shape depends on the final position that the blanks are pushed down in. The metal used in deep drawing must be malleable as well as resistant to stress and tension damage.


How to get high quality pipe cap?

Pipe cap acts as protective device and are designed to protect pipe ends of various shapes. The main purpose of using pipe caps is to waterproof the connections. They are also used to close the the ends of hydraulic or pneumatic pipes and tubes. 

They are used in the plumbing apparatus of domestic, commercial and industrial water supply lines, machinery and processing equipment etc. They are also fitted on water pump lines with the sole purpose of removing air blocks. Pipe caps are highly demanded as an important category of pipe fittings. If a solvent-weld cap is used to provide for a future connection point, several inches of pipe must be left before the cap; when the cap is cut off for the future connection, enough pipe must remain to allow a new fitting to be glued onto it.

How to connect pipeline with pipe cap?

Pipe Cap is directly welded to die at the end of the pipeline; at the end of the pipeline can also welding flange, then with a blind flange to death, when necessary can open the blind flange, pipeline check inside. The conventional cap holder with pressure pressing made by thick wall; forging; by spinning large diameter. The need for maintenance or even after the connecting line, with blind, not later, with a pipe cap. With the blind plate has the possibility of leakage, there is a long time, and screw rust died, as useless, the heat pipe is not very easy to heat insulation.

SURFACE TREATMENT:

  • Transparent oil, rust-proof black oil or hot galvanized.
  • Special design available All the production process are made according to ISO9001:2000 strictly.
  • Based on different materials, pipe caps include carbon steel cap, stainless steel cap, and alloy steel cap etc.
  • Depending on their construction, pipe caps contain threaded cap, tapered cap and anti-roll cap etc.

Cap geometry and Weight

Out diameter High size Wall thickness accord to ‘E’
DN NPS E E1 E
15 1/2 25 25 3.73
20 3/4 25 25 3.91
25 1 38 38 4.55
32 11/4 38 38 4.85
40 11/2 38 38 5.08
50 2 38 44 5.54
65 21/2 38 51 7.01
80 3 51 64 7.62
90 31/2 64 76 8.08
100 4 64 76 8.56
125 5 76 89 9.53
150 6 89 102 10.97
200 8 102 127 12.7
250 10 127 152 12.7
300 12 152 178 12.7
350 14 165 191 12.7
400 16 178 203 12.7
450 18 203 229 12.7
500 20 229 254 12.7
550 22 254 254 12.7
600 24 267 305 12.7
650 26 267    
700 28 267    
750 30 267    
800 32 267    
850 34 267    
900 36 267    
950 38 305    
1000 40 305    
1050 42 305    
1100 44 343    
1150 46 343    
1200 48 343    

Pipe cap size data

Pipe Cap are used for connecting pipes of different diameters and find wide applications in various chemicals, construction industries, paper, cement & ship builders

Out diameter High size Wall thickness accord to ‘E’
DN NPS E E1 E
15 1/2 25 25 3.73
20 3/4 25 25 3.91
25 1 38 38 4.55
32 11/4 38 38 4.85
40 11/2 38 38 5.08
50 2 38 44 5.54
65 21/2 38 51 7.01
80 3 51 64 7.62
90 31/2 64 76 8.08
100 4 64 76 8.56
125 5 76 89 9.53
150 6 89 102 10.97
200 8 102 127 12.7
250 10 127 152 12.7
300 12 152 178 12.7
350 14 165 191 12.7
400 16 178 203 12.7
450 18 203 229 12.7
500 20 229 254 12.7
550 22 254 254 12.7
600 24 267 305 12.7
650 26 267    
700 28 267    
750 30 267    
800 32 267    
850 34 267    
900 36 267    
950 38 305    
1000 40 305    
1050 42 305    
1100 44 343    
1150 46 343    
1200 48 343    
  • Size range: 1/2 to 56 inches (DN15 to DN1400)
  • Pressure: SCH5 to SCH160v
  • Wall Thickness:sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s
  • Max. wall thickness: 200mm
Size range of A234 WPB Large Diameter Pipe Cap
OD ND INCH SCH20 SCH40 SCH80 STD XS
Weight Weight Weight Weight Weight
88.9 80 3 0.66 0.92 0.66 0.92
114.3 100 4 1.17 1.67 1.17 1.67
141.3 125 5 1.91 2.78 1.91 2.78
168.3 150 6 2.9 4.47 2.9 4.47
219.1 200 8 4.09 5.19 8.05 5.19 8.05
273 250 10 6.36 9.15 12.5 9.15 12.5
323.8 300 12 9.08 14.4 26.8 13.2 17.3
355.6 350 14 13.2 18.8 34.5 15.9 20.4
406.4 400 16 16.8 26.7 47.7 20.4 26.3
457.2 450 18 24.8 41.8 67.7 25.9 33.6
508 500 20 32.2 54.9 91.3 32.2 42.7
558.8 550 22 37.7 49.9
609.6 600 24 46.3 93.1 155 46.3 59.5

Based on different materials, pipe caps include carbon steel cap, stainless steel cap, and alloy steel cap etc.

Depending on their construction, pipe caps contain threaded cap, tapered cap and anti-roll cap etc.

DIN 2617 Pipe End Cap Dimensions
    WDR      
    3 4 5  
DN d1 s s s h
15 21.3 2 3.2 4 25
20 26.9 2.3 3.2 4 25
25 33.7 2.6 3.2 4 38
32 42.4 2.6 3.6 4 38
40 48.3 2.6 4 5 38
50 60.3 2.9 4.5 5.6 38
65 76.1 2.9 5 7.1 38
80 88.9 3.2 5.6 8 51
100 114.3 3.6 6.3 8.8 64
125 139.7 4 6.3 10 76
150 168.3 4.5 7.1 11 89
200 219.1 6.3 8 12.5 102
250 273 6.3 8.8 14.2 127
300 323.9 7.1 10 16 152

DIN 28011 Pipe End Cap Dimensions

ISO – dimensions

dimensions d1 x s height L weight / kg
21,3 x 2,0 9,0 0,01
26,9 x 2,0 9,0 0,01
33,7 x 2,0 13,0 0,02
42,4 x 2,0 13,0 0,04
48,3 x 2,0 13,5 0,05
60,3 x 2,0 18,5 0,07
76,1 x 2,0 20,5 0,10
88,9 x 2,0 25,0 0,15
114,3 x 2,0 28,0 0,26
114,3 x 3,0 29,0 0,39
139,7 x 3,0 38,5 0,60
168,3 x 3,0 47,5 0,90
219,1 x 3,0 63,5 1,32
273,0 x 3,0 93,0 1,95
323,9 x 3,0 102,0 2,70
355,6 x 3,0 109,0 3,80
406,4 x 3,0 123,0 5,00
457,2 x 3,0 123,0 6,10
508,0 x 3,0 133,0 7,60

Metric dimensions

dimensions d1 x s height L weight / kg
20,0 x 2,0 9,0 0,02
25,0 x 2,0 9,0 0,03
30,0 x 2,0 13,5 0,03
35,0 x 2,0 13,5 0,04
44,0 x 2,0 15,0 0,04
54,0 x 2,0 15,0 0,05
70,0 x 2,0 19,5 0,07
84,0 x 2,0 24,0 0,15
104,0 x 2,0 28,0 0,20
129,0 x 2,0 37,0 0,36
154,0 x 2,0 43,0 0,50
156,0 x 3,0 44,0 0,94
204,0 x 2,0 62,0 0,80
206,0 x 3,0 63,0 1,20
254,0 x 2,0 72,0 1,30
256,0 x 3,0 73,0 1,95
306,0 x 3,0 83,0 2,50