ASTM B366 / ASME SB366 INCONEL 625 / UNS N06625 / DIN 2.4856 CAP NICKEL ALLOY BUTT WELD FITTING

Overview:

An Inconel 625 cap is a pipe fitting used to cover the end of a pipe. Inconel 625 is a high-performance nickel-chromium-molybdenum alloy that offers excellent corrosion resistance in a wide range of corrosive environments. It is particularly useful in applications where high strength and resistance to both oxidizing and reducing acids are required. The cap is typically welded onto the end of the pipe to provide a permanent seal that prevents leaks or contaminants from entering the pipe. Inconel 625 caps are commonly used in industries such as chemical processing, aerospace, and marine engineering.

Specification:

 

Standard	ASTM B366/ASME SB366
Material	INCONEL 625/UNS N06625/DIN 2.4856
Type	Buttweld Cap
Connection	Welding
Size	1/2"-48"(DN15-DN1200) or custom size
Thickness	SCH10S-XXS(2-60mm)
Surface	Sand Blasting
Packing	Plywood case/Pallet

 

Chemical Composition:

 

Grade

UNS

C

Mn

Si

P

S

Cr

Nb+Ta

Mo

Fe

Al

Ti

Ni

Inconel 625

N06625

0.10 max

0.50 max

0.50 max

0.015 max

0.015 max

20.0-23.0

3.15-4.15

8.0-10.0

5.0 max

0.40 max

0.40 max

58.0 min

 

Mechanical Properties:

 

Grade	UNS	Condition	Yield Strength min, ksi [MPa]	Tensile Strength min, ksi [MPa]	Elongation %
Inconel 625	N06625	Grade 1 (annealed)	60(414)	120(827)	30
		Grade 2 (Solution annealed)	40(276)	100(690)	30

 

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.

 

Application:

1. Oil and gas industries: Inconel 625 caps may be used for oil and gas wellhead equipment, drilling components, and heat exchangers.

2. Chemical processing industry: Inconel 625 caps may be utilized in processing equipment such as reactors, distillation columns, and pressure vessels.

3. Aerospace industry: Inconel 625 caps may be used in aircraft and rocket engines, as well as in exhaust systems.

4. Marine engineering industry: Inconel 625 caps may be used in shipbuilding, specifically in seawater piping, heat exchangers, and other marine applications.