Pipe Flange Covers | McMaster-Carr

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Wraparound with pH Patch

Wraparound with See-Through Center

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

For Actual Pipe OD

Attachment Type

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112 Products

Leak-Detecting Pipe Flange Covers with pH Patch

When a tiny amount of liquid makes contact with the pH patch, it changes color to indicate a leak. Patch is orange when neutral. The wrap-around design of these covers contains acid and caustic pipe leaks, protecting personnel and equipment.

PTFE-Coated Fiberglass—PTFE-coated fiberglass covers are highly resistant to acids, alkalies, and most chemicals except hydrofluoric acid.

	Max. Temp., ° F	For Use Outdoors		Each
Plastic







	Red

	1/2	27/32"	150	140	Yes	9169K33	000000


	3/4	1 3/64"	150	140	Yes	9169K34	00000
	1	1 5/16"	150	140	Yes	9169K35	00000
	1 1/2	1 29/32"	150	140	Yes	9169K37	00000
	2	2 3/8"	150	140	Yes	9169K38	00000
	3	3 1/2"	150	140	Yes	9169K39	00000
	4	4 1/2"	150	140	Yes	9169K41	00000
	6	6 5/8"	150	140	Yes	9169K42	00000




			White

			1/2	27/32"	150	140	Yes	9169K13	00000


			3/4	1 3/64"	150	140	Yes	9169K14	00000
			1	1 5/16"	150	140	Yes	9169K15	00000
			1 1/2	1 29/32"	150	140	Yes	9169K17	00000
			2	2 3/8"	150	140	Yes	9169K18	00000
			3	3 1/2"	150	140	Yes	9169K19	00000
			4	4 1/2"	150	140	Yes	9169K21	00000
			6	6 5/8"	150	140	Yes	9169K22	00000


			PTFE-Coated Fiberglass







							Beige

							1/2	27/32"	150	450	Yes	6811K24	00000


							3/4	1 3/64"	150	450	Yes	6811K25	00000
							1	1 5/16"	150	450	Yes	6811K26	00000
							1 1/2	1 29/32"	150	450	Yes	6811K28	00000
							2	2 3/8"	150	450	Yes	6811K29	00000
							3	3 1/2"	150	450	Yes	6811K32	00000
							4	4 1/2"	150	450	Yes	6811K34	00000
							6	6 5/8"	150	450	Yes	6811K36	00000

Replacement Leak-Detecting pH Patches

	Pkg. Qty.		Pkg.
Replacement pH Patches	10	9169K77	000000

See-Through Leak-Detecting Pipe Flange Covers

The clear plastic center permits easy visual inspection, and the wrap-around design contains acid and caustic pipe leaks, protecting personnel and equipment.

	Max. Temp., ° F	For Use Outdoors		Each
Plastic







	Orange

	1/2	27/32"	150	300	Yes	45125K48	000000


	3/4	1 3/64"	150	300	Yes	45125K49	00000
	1	1 5/16"	150	300	Yes	45125K51	00000
	1 1/2	1 29/32"	150	300	Yes	45125K52	00000
	2	2 3/8"	150	300	Yes	45125K53	00000
	3	3 1/2"	150	300	Yes	45125K54	00000
	4	4 1/2"	150	300	Yes	45125K55	00000
	6	6 5/8"	150	300	Yes	45125K56	00000

Adhesive-Back Caps for Pipe Flanges

Stick these caps onto the raised face of flanges to prevent nicks and scratches during shipping and storage. They stay in place until you peel them off and leave no residue behind.

Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.

	Max. Temp., ° F	Color	Adhesive Type	Pkg. Qty.		Pkg.
Polyethylene







	For ANSI Flanges

	1/2	1 3/8"	Rigid	160	Black	Rubber	20	3445T11	000000


	3/4	1 11/16"	Rigid	160	Black	Rubber	15	3445T12	00000
	1	2"	Rigid	160	Black	Rubber	15	3445T13	00000
	1 1/4	2 1/2"	Rigid	160	Black	Rubber	10	3445T14	00000
	1 1/2	2 7/8"	Rigid	160	Black	Rubber	10	3445T15	00000
	2	3 5/8"	Rigid	160	Black	Rubber	10	3445T16	00000
	2 1/2	4 1/8"	Rigid	160	Black	Rubber	6	3445T17	00000
	3	5"	Rigid	160	Black	Rubber	4	3445T18	00000
	3 1/2	5 1/2"	Rigid	160	Black	Rubber	4	3445T19	00000
	4	6 3/16"	Rigid	160	Black	Rubber	3	3445T21	00000
	5	7 5/16"	Rigid	160	Black	Rubber	3	3445T22	00000


	6	8 1/2"	Rigid	160	Black	Rubber	1	3445T23	00000
	8	10 5/8"	Rigid	160	Black	Rubber	1	3445T24	00000
	10	12 3/4"	Rigid	160	Black	Rubber	1	3445T25	00000
	12	15"	Rigid	160	Black	Rubber	1	3445T26	00000
	14	16 1/4"	Rigid	160	Black	Rubber	1	3445T27	00000
	16	18 1/2"	Rigid	160	Black	Rubber	1	3445T28	00000
	18	21"	Rigid	160	Black	Rubber	1	3445T29	00000
	20	23"	Rigid	160	Black	Rubber	1	3445T31	00000

Snap-On Caps for Pipe Flanges

Cap Installed

on ANSI Flange

For ANSI Flanges

For SAE Flanges

Align the tabs with the bolt holes and snap on for a perfect fit. These caps protect flange threads from damage, or mask them during painting and coating.

Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.

	Max. Temp., ° F	Color	For Bolt Hole Ctr.-to-Ctr.	Pkg. Qty.		Pkg.
Polyethylene







	For ANSI Flanges

	1/2	150	Rigid	175	Red	2 3/8"	10	4262N11	00000


	3/4	150	Rigid	175	Red	2 3/4"	10	4262N12	0000
	1	150	Rigid	175	Red	3 1/8"	10	4262N13	00000
	1 1/2	150	Rigid	175	Red	3 7/8"	10	4262N14	00000
	2	150	Rigid	175	Red	4 3/4"	10	4262N15	00000
	2 1/2	150	Rigid	175	Red	5 1/2"	1	4262N16	0000
	3	150	Rigid	175	Red	6"	1	4262N17	0000
	4	150	Rigid	175	Red	7 1/2"	1	4262N18	0000
	6	150	Rigid	175	Red	9 5/8"	1	4262N311	0000




			For SAE Flanges

			1/2	3000	Rigid	175	Blue	0.69", 1 1/2"	10	7962N11	0000


			1/2	6000	Rigid	175	Red	0.72", 1.59"	10	7962N17	0000
			3/4	3000	Rigid	175	Blue	0.88", 1.88"	10	7962N12	00000
			3/4	6000	Rigid	175	Red	0.94", 2"	10	7962N18	0000
			1	3000	Rigid	175	Blue	1.03", 2.06"	10	7962N13	00000
			1	6000	Rigid	175	Red	1.09", 2 1/4"	10	7962N19	00000
			1 1/4	3000	Rigid	175	Blue	1.19", 2.31"	10	7962N14	00000
			1 1/4	6000	Rigid	175	Red	1 1/4", 2.63"	10	7962N21	00000
			1 1/2	3000	Rigid	175	Blue	1.41", 2 3/4"	10	7962N15	00000
			1 1/2	6000	Rigid	175	Red	1.44", 3.13"	10	7962N22	00000
			2	3000	Rigid	175	Blue	1.69", 3.06"	10	7962N16	00000


			2	6000	Rigid	175	Red	1 3/4", 3.81"	10	7962N23	00000

Caps for Pipe Flanges

Push on these caps to cover the face and edge of pipe flanges or the ends of flared and beaded tubing. They prevent surface scratches and hole damage during shipping and storage as well as mask while painting and coating.

Vinyl Plastic—A good all-around choice, these durable caps won’t rip or shred, even with repeated use. They also hold up to oils, mild acids, and solvents. Caps are flexible and conform to parts for a tight fit.

	For Flange					Black			Red			Yellow
	OD	Thk.	Bottom Opening Dia.	Flexibility	Max. Temp., ° F	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
Vinyl Plastic



		1 5/16"	1/8"	5/8"	Flexible	140	—	———	0	—	———	0	10	9532K11	000000


		1 1/2"	1/8"	1"	Flexible	140	10	9532K387	000000	—	———	0	—	———	0
		1 5/8"	1/8"	1"	Flexible	140	—	———	0	—	———	0	10	9532K13	00000
		1 15/16"	1/8"	1 1/4"	Flexible	140	10	9532K389	00000	—	———	0	10	9532K14	00000
		2 3/16"	1/8"	1 1/2"	Flexible	140	10	9532K39	00000	10	9532K41	000000	10	9532K35	00000
		2 11/16"	1/8"	2"	Flexible	140	10	9532K391	00000	10	9532K411	00000	10	9532K36	00000
		2 7/8"	1/8"	2 1/8"	Flexible	140	10	9532K392	00000	10	9532K412	00000	10	9532K37	00000
		3 3/16"	1/8"	2 1/2"	Flexible	140	10	9532K393	00000	10	9532K413	00000	10	9532K38	00000
		3 9/16"	1/8"	3"	Flexible	140	10	9532K394	00000	10	9532K414	00000	10	9532K19	00000
		3 5/8"	1/8"	3"	Flexible	140	10	9532K395	00000	10	9532K415	00000	10	9532K21	00000
		4 5/32"	1/8"	3 1/2"	Flexible	140	10	9532K396	00000	10	9532K416	00000	10	9532K22	0000


		4 11/16"	1/8"	4"	Flexible	140	5	9532K397	00000	5	9532K417	00000	5	9532K23	0000
		4 15/16"	1/8"	4 1/4"	Flexible	140	5	9532K398	00000	—	———	0	5	9532K382	00000
		5 3/16"	1/8"	4 1/2"	Flexible	140	—	———	0	—	———	0	5	9532K25	00000
		5 11/16"	1/8"	5"	Flexible	140	—	———	0	—	———	0	1	9532K27	0000
		5 15/16"	1/8"	5 1/4"	Flexible	140	—	———	0	—	———	0	2	9532K384	00000
		6 3/16"	1/8"	5 1/2"	Flexible	140	—	———	0	—	———	0	2	9532K385	00000
		6 11/16"	1/8"	6"	Flexible	140	2	9532K404	00000	—	———	0	2	9532K31	00000
		7 3/16"	1/8"	6 1/2"	Flexible	140	2	9532K405	00000	—	———	0	2	9532K32	00000