ASTM A234 WPB End Cap Carbon Steel Buttweld Pipe Fitting

Overview:

The WPB End Cap is a critical component in various piping and tubing systems, designed to seal the ends or terminations of a pipe or tube. Typically made from materials like plastic, metal, or composite, its primary function is to prevent the ingress of contaminants, fluids, or gases, ensuring the integrity of the system.

In terms of design, it features a snug fit, allowing for seamless installation. Some end caps have additional features like grooves or threading for enhanced security and stability. The choice of material often depends on the application environment—whether it involves high pressure, corrosive substances, or extreme temperatures.

Applications of WPB End Caps are widespread, ranging from plumbing and HVAC systems to industrial machinery and automotive components. These end caps help maintain system efficiency and safety by minimizing leakages and protecting internal components from external elements.

Moreover, they are available in different sizes and shapes to accommodate various pipe diameters and specifications, making them versatile for many installations. When it comes to maintenance, these end caps can usually be removed and replaced easily, facilitating repairs or modifications to the system without significant downtime.

Specification:

 

Standard	ASTM A234/ASME SA234
Material	WPB
Type	Buttweld Cap
Connection	Welding
Size	1/2"-48"(DN15-DN1200) or custom size
Thickness	SCH10S-XXS(2-60mm)
Surface	Black Painting
Packing	Plywood case/Pallet

 

Chemical Composition:

 

Grade	C	Mn	P	S	Si	Cr	Mo	Ni	Cu	Others
WPB	0.03 max	0.29-1.06	0.05 max	0.058 max	0.10 min	0.40 max	0.15 max	0.40 max	0.40 max	Vanadium 0.08

 

Mechanical Properties:

 

Grade	Yield Strength, min, ksi [MPa]	Tensile Strength, min, ksi [MPa]	Elongation %
WPB	35(240)	60(415)	22

 

Dimension for BW Cap:

 

Nominal Size		Out Diameter at Bevel (mm)	Length (mm)		Limiting Wall Thickness for Length E (mm)
DN	NPS	O.D.	E	E1
15	1/2	21.3	25	25	4.57
20	3/4	26.7	25	25	3.81
25	1	33.4	38	38	4.57
32	1 1/4	42.2	38	38	4.83
40	1 1/2	48.3	38	38	5.08
50	2	60.3	38	44	5.59
65	2 1/2	73.0	38	51	7.11
80	3	88.9	51	64	7.62
90	3 1/2	101.6	64	76	8.13
100	4	114.3	64	76	8.64
125	5	141.3	76	89	9.65
150	6	168.3	89	102	10.92
200	8	219.1	102	127	12.7
250	10	273.0	127	152	12.7
300	12	323.8	152	178	12.7
350	14	355.6	165	191	12.7
400	16	406.4	178	203	12.7
450	18	457.0	203	229	12.7
500	20	508.0	229	254	12.7
550	22	559.0	254	254	12.7
600	24	610.0	267	305	12.7
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	...	...
GENERAL NOTE: The shape of these caps shall be ellipsoidal and shall conform to the requirements given in the ASME Boiler and Pressure Vessel Code. NOTES: (1) Length E applies for thickness not exceeding that given in column “Limiting Wall Thickness for Length, E.” (2) Length E1 applies for thickness greater than that given in column “Limiting Wall Thickness for Length, E” for NPS 24 and smaller. For NPS 26 and larger, length E1 shall be by agreement between the manufacturer and purchaser.