1500 Pressure Class Pipe Flanges

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About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Fitting Type

Cap

Cover a pipe end to seal it

8 products

Threading

Threaded

Screw onto pipe and fittings with compatible threads and genders

8 products

Threading

Unthreaded

Weld pipe and fittings together or join with sealant

18 products

Extreme-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in extreme-pressure lines. Also known as Pressure Class 1500 flanges, bolt two of the same size together with a gasket (not included). These flanges are made of iron or steel, so they're best for noncorrosive environments.

Forged Flanges


Front	Raised Surface on Back

Forged flanges have better strength than cast flanges.

	Pipe Size		Dash Size					Bolt Hole
	(A)	(B)	(A)	(B)	Flanged Connection Surface (B)	Flange OD	For Bolt Dia.	Dia.	No. Of	Bolt Circle Dia.	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPT Female



		1/2	1/2	08	08	Raised	4 3/4"	3/4"	7/8"	4	3 1/4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T41	0000000


		3/4	3/4	12	12	Raised	5 1/8"	3/4"	7/8"	4	3 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T42	000000
		1	1	16	16	Raised	5 7/8"	7/8"	1"	4	4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T43	000000
		1 1/4	1 1/4	20	20	Raised	6 1/4"	7/8"	1"	4	4 3/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T44	000000
		1 1/2	1 1/2	24	24	Raised	7"	1"	1 1/8"	4	4 7/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T45	000000
		2	2	32	32	Raised	8 1/2"	7/8"	1"	8	6 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1153T46	000000
		3	3	48	48	Raised	10 1/2"	1 1/4"	1 1/4"	8	8"	1500	Steel	Not Rated	Not Rated	1153T47	000000
		4	4	64	64	Raised	12 1/4"	1.38"	1.38"	8	9 1/2"	1500	Steel	Not Rated	Not Rated	1153T48	000000

Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

Strong enough for extreme-pressure lines, these flanges create an access point. Also known as Pressure Class 1500 flanges, bolt two of the same size together with a gasket (not included). Flanges are made of steel, so they’re best for noncorrosive environments.

Forged Flanges


Butt Weld: Front	Butt Weld: Raised Surface on Back	Slip-On Weld Female: Front

Slip-On Weld Female: Raised Surface on Back	Socket-Connect Female: Front	Socket-Connect Female: Raised Surface on Back

Forged flanges have better strength than cast flanges.

Butt-Weld Fitting Connection—Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.

Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.

	Pipe Size		Dash Size					Bolt Hole
	(A)	(B)	(A)	(B)	Flanged Connection Surface (B)	Flange OD	For Bolt Dia.	Dia.	No. Of	Bolt Circle Dia.	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Butt Weld



		1	1	16	16	Raised	5 7/8"	7/8"	1"	4	4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T41	0000000


		1 1/2	1 1/2	24	24	Raised	7"	1"	1 1/8"	4	4 7/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T43	000000
		2	2	32	32	Raised	8 1/2"	7/8"	1"	8	6 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T44	000000
		3	3	48	48	Raised	10 1/2"	1 1/4"	1 1/4"	8	8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T69	000000


		Slip-On Weld Female



				1	1	16	16	Raised	5 7/8"	7/8"	1"	4	4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T47	000000


				2	2	32	32	Raised	8 1/2"	7/8"	1"	8	6 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T51	000000


				Socket-Connect Female



						3/4	3/4	12	12	Raised	5 1/8"	3/4"	7/8"	4	3 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T59	000000


						1	1	16	16	Raised	5 7/8"	7/8"	1"	4	4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T61	000000
						1 1/2	1 1/2	24	24	Raised	7"	1"	1 1/8"	4	4 7/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T63	000000
						2	2	32	32	Raised	8 1/2"	7/8"	1"	8	6 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T64	000000

Forged Blind Flanges


Front	Raised Surface on Back

Forged flanges have better strength than cast flanges.

						Bolt Hole
	Pipe Size	Dash Size	Flanged Connection Surface	Flange OD	For Bolt Dia.	Dia.	No. Of	Bolt Circle Dia.	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Flanged



		1/2	08	Raised	4 3/4"	3/4"	7/8"	4	3 1/4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T52	0000000


		3/4	12	Raised	5 1/8"	3/4"	7/8"	4	3 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T53	000000
		1	16	Raised	5 7/8"	7/8"	1"	4	4"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T54	000000
		1 1/4	20	Raised	6 1/4"	7/8"	1"	4	4 3/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T55	000000
		1 1/2	24	Raised	7"	1"	1 1/8"	4	4 7/8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T56	000000
		2	32	Raised	8 1/2"	7/8"	1"	8	6 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T57	000000
		3	48	Raised	10 1/2"	1 1/4"	1 1/4"	8	8"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T72	000000
		4	64	Raised	12 1/4"	1.38"	1.38"	8	9 1/2"	1500	Steel	3,700 psi @ 72° F	3,200 psi @ 300° F	1139T73	000000