Steel Pipe Cap
Steel Pipe Cap
Steel Pipe Cap

Steel Pipe Cap

ASME 16.9 Steel pipe caps are usually welded onto end of pipe that blcok off the piping line system, it has same funtion with plugs and blind flanges. It is available in material of carbon steel, stainless steel and alloy steel. Butt weld cap dimensions is from 1/2" to 48" and...

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Product Introduction

Butt weld cap dimensions is from 1/2" to 48" and thickness covers Sch 10S, Sch 40, Sch 80, Sch 160, STD, XS, XXS. We can manufacture BW CAP in stanadrd of ASME B16.9, MSS SP 43, DIN, JIS and EN.

Difference between Steel Pipe Caps and Plugs

Connection

Steel pipe caps are used to connect with pipeline by welding and screwing. There is one way for plugs that screw on the ends of pipe.

Shape

There are three shapes of steel pipe cap that butt weld cap, socket weld cap and threaded cap. While threaded plug have hex head, round head and square head.

Standard

Manufacturing standard of pipe cap is ASME B16.9 & ASME B16.11 and plug is ASME B16.11

Process

The manufacturing process for threaded plug is forging and casting. While for caps, it is hot press or cold press and forging.

Thread

Threaded cap have female thread while plug is male thread.

Steel Pipe Cap Material Grade

Carbon Steel Cap

ASTM A234 WPB/WPC, ASTM A420 WPL6, ASTM A860 WPHY 42 / 46 / 56 / 60 / 65

Alloy Steel Cap

ASTM A234 WP11 / WP12 / WP5 / WP9 / WP22 / WP91 / WP92, 15CrMoG,12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5

Stainless Steel Cap

ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L, A815 S32205, S31803, 32750, 32760

Inspection and Package of Butt Weld Cap

CAP BW SEAMLESS 36 INCH SCH 40 ASTM A234 WPB ASME B16.9

ASME B16.9 Steel Pipe Cap Dimensions

DN	NPS	OD	E	E1
15	1/2	21.3	25	25
20	3/4	26.7	25	25
25	1	33.4	38	38
32	11/4	42.2	38	38
40	11/2	48.3	38	38
50	2	60.3	38	44
65	21/2	73.0	38	51
80	3	88.9	51	64
90	31/2	101.6	64	76
100	4	114.3	64	76
125	5	141.3	76	89
150	6	168.3	89	102
200	8	219.1	102	127
250	10	273.0	127	152
300	12	323.8	152	178
350	14	355.6	165	191
400	16	406.4	178	203
450	18	457.0	203	229
500	20	508.0	229	254
550	22	559.0	254	254
600	24	610.0	267	305
650	26	660.0	267	---
700	28	711.0	267	---
750	30	762.0	267	---
800	32	813.0	267	---
850	34	864.0	267	---
900	36	914.0	267	---
950	38	965.0	305	---
1000	40	1016.0	305	---
1050	42	1067.0	305	---
1100	44	1118.0	343	---
1150	46	1168.0	343	---
1200	48	1219.0	343	---

Notes:

1) The configuration of the cap is normal ellipse.

2) Length E applies for the thickness not exceeding the Limitting Wall Thickness.For the caps with DN≥650(NPS26), they will be made subject to the sizes agreed between purchaser and manufacturer or be supplied according to manufacturer's size.

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