Aluminum (Schedule 40) Unthreaded Pipe

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180 Products

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

Pipe

Pair with fittings to transfer water, air, and other materials

Fitting Type

Adapter

Bridge the gap between pipe with different fitting connections

0 products

Reducing Adapter

Join pipe of different sizes and fitting connections

0 products

Standard-Wall Aluminum Unthreaded Pipe Nipples and Pipe

With a thicker wall than our thin-wall aluminum pipe, this pipe is also known as Schedule 40. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. This pipe meets ASTM B241, so it meets strict manufacturing requirements to ensure performance and quality. Made of aluminum, it’s lightweight with good corrosion resistance.

Pipe—Unthreaded

Pipe

Seamless—Pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.

	Lg.	Construction	Pipe Schedule	Material		Each
Butt Weld/Socket Connect/Weld Socket Male







				1/8 Pipe Size

				4"	Seamless	40	6061 Aluminum	5038K514	00000


				6"	Seamless	40	6061 Aluminum	5038K516	0000
				8"	Seamless	40	6061 Aluminum	5038K517	00000
				10"	Seamless	40	6061 Aluminum	5038K518	00000
				1 ft.	Seamless	40	6061 Aluminum	5038K152	00000
				1 1/2 ft.	Seamless	40	6061 Aluminum	5038K519	00000
				3 ft.	Seamless	40	6061 Aluminum	5038K51	00000
				6 ft.	Seamless	40	6061 Aluminum	5038K65	00000




						1/4 Pipe Size

						1 1/2"	Seamless	40	6061 Aluminum	5038K521	0000


						2"	Seamless	40	6061 Aluminum	5038K522	0000
						4"	Seamless	40	6061 Aluminum	5038K524	0000
						6"	Seamless	40	6061 Aluminum	5038K526	0000
						1 ft.	Seamless	40	6061 Aluminum	5038K162	00000
						3 ft.	Seamless	40	6061 Aluminum	5038K52	00000
						6 ft.	Seamless	40	6061 Aluminum	5038K19	00000




								3/8 Pipe Size

								1 1/2"	Seamless	40	6061 Aluminum	5038K531	0000


								2"	Seamless	40	6061 Aluminum	5038K532	0000
								3"	Seamless	40	6061 Aluminum	5038K533	0000
								6"	Seamless	40	6061 Aluminum	5038K536	00000
								8"	Seamless	40	6061 Aluminum	5038K537	00000
								10"	Seamless	40	6061 Aluminum	5038K538	00000
								1 ft.	Seamless	40	6061 Aluminum	5038K172	00000
								1 1/2 ft.	Seamless	40	6061 Aluminum	5038K539	00000
								3 ft.	Seamless	40	6061 Aluminum	5038K53	00000
								6 ft.	Seamless	40	6061 Aluminum	5038K12	00000




										1/2 Pipe Size

										2"	Seamless	40	6061 Aluminum	5038K542	0000


										3"	Seamless	40	6061 Aluminum	5038K543	0000
										4"	Seamless	40	6061 Aluminum	5038K544	0000
										5"	Seamless	40	6061 Aluminum	5038K545	00000
6"										Seamless	40	6061 Aluminum	5038K546	00000
8"	Seamless									40	6061 Aluminum	5038K547	00000
10"	Seamless									40	6061 Aluminum	5038K548	00000
1 ft.	Seamless									40	6061 Aluminum	5038K182	00000
1 1/2 ft.	Seamless									40	6061 Aluminum	5038K549	00000
3 ft.	Seamless	40								6061 Aluminum	5038K54	00000
6 ft.	Seamless	40	6061 Aluminum							5038K13	00000




		3/4 Pipe Size

		1 1/2"	Seamless							40	6061 Aluminum	5038K551	0000


		3"	Seamless							40	6061 Aluminum	5038K553	0000
		4"	Seamless							40	6061 Aluminum	5038K554	0000
		5"	Seamless							40	6061 Aluminum	5038K555	00000
		10"	Seamless							40	6061 Aluminum	5038K558	00000
		1 ft.	Seamless							40	6061 Aluminum	5038K222	00000
		1 1/2 ft.	Seamless							40	6061 Aluminum	5038K559	00000
		3 ft.	Seamless	40						6061 Aluminum	5038K55	00000
		6 ft.	Seamless	40	6061 Aluminum					5038K14	00000




				1 Pipe Size

				2"	Seamless					40	6061 Aluminum	5038K561	0000


				4"	Seamless					40	6061 Aluminum	5038K563	00000
				5"	Seamless					40	6061 Aluminum	5038K564	00000
				6"	Seamless					40	6061 Aluminum	5038K565	00000
				8"	Seamless					40	6061 Aluminum	5038K566	00000
				10"	Seamless					40	6061 Aluminum	5038K567	00000
				1 ft.	Seamless	40				6061 Aluminum	5038K231	00000
				1 1/2 ft.	Seamless	40	6061 Aluminum			5038K568	00000
				3 ft.	Seamless	40	6061 Aluminum			5038K56	00000
				6 ft.	Seamless	40	6061 Aluminum			5038K21	00000




						1 1/4 Pipe Size

						2"	Seamless			40	6061 Aluminum	5038K569	0000


						3"	Seamless			40	6061 Aluminum	5038K571	00000
						4"	Seamless			40	6061 Aluminum	5038K572	00000
						5"	Seamless			40	6061 Aluminum	5038K573	00000
						6"	Seamless			40	6061 Aluminum	5038K574	00000
						8"	Seamless			40	6061 Aluminum	5038K575	00000
						10"	Seamless	40		6061 Aluminum	5038K576	00000
						1 ft.	Seamless	40	6061 Aluminum	5038K241	00000
						1 1/2 ft.	Seamless	40	6061 Aluminum	5038K577	00000
						3 ft.	Seamless	40	6061 Aluminum	5038K57	00000
						6 ft.	Seamless	40	6061 Aluminum	5038K22	000000




								1 1/2 Pipe Size

								2"	Seamless	40	6061 Aluminum	5038K578	0000


								3"	Seamless	40	6061 Aluminum	5038K579	00000
								4"	Seamless	40	6061 Aluminum	5038K581	00000
								6"	Seamless	40	6061 Aluminum	5038K583	00000
8"								Seamless	40	6061 Aluminum	5038K584	00000
10"	Seamless							40	6061 Aluminum	5038K585	00000
1 ft.	Seamless							40	6061 Aluminum	5038K251	00000
1 1/2 ft.	Seamless							40	6061 Aluminum	5038K586	00000
3 ft.	Seamless							40	6061 Aluminum	5038K58	00000
6 ft.	Seamless							40	6061 Aluminum	5038K23	000000




								2 Pipe Size

								3"	Seamless	40	6061 Aluminum	5038K587	00000


								4"	Seamless	40	6061 Aluminum	5038K588	00000
								5"	Seamless	40	6061 Aluminum	5038K589	00000
		6"						Seamless	40	6061 Aluminum	5038K591	00000
		1 ft.	Seamless					40	6061 Aluminum	5038K322	00000
		1 1/2 ft.	Seamless					40	6061 Aluminum	5038K592	00000
		3 ft.	Seamless					40	6061 Aluminum	5038K59	000000
		6 ft.	Seamless					40	6061 Aluminum	5038K24	000000




								2 1/2 Pipe Size

								4"	Seamless	40	6061 Aluminum	5038K593	00000


								6"	Seamless	40	6061 Aluminum	5038K595	00000
								8"	Seamless	40	6061 Aluminum	5038K596	00000
								1 ft.	Seamless	40	6061 Aluminum	5038K332	00000
								3 ft.	Seamless	40	6061 Aluminum	5038K61	000000
				6 ft.				Seamless	40	6061 Aluminum	5038K25	000000




								3 Pipe Size

								4"	Seamless	40	6061 Aluminum	5038K597	00000


								6"	Seamless	40	6061 Aluminum	5038K599	00000
								1 ft.	Seamless	40	6061 Aluminum	5038K342	00000
								1 1/2 ft.	Seamless	40	6061 Aluminum	5038K613	000000
								3 ft.	Seamless	40	6061 Aluminum	5038K62	000000
								6 ft.	Seamless	40	6061 Aluminum	5038K26	000000




						4 Pipe Size

						4"	Seamless			40	6061 Aluminum	5038K614	00000


						5"	Seamless			40	6061 Aluminum	5038K615	00000
						6"	Seamless			40	6061 Aluminum	5038K616	00000
						8"	Seamless			40	6061 Aluminum	5038K617	00000
						10"	Seamless			40	6061 Aluminum	5038K618	000000
						1 ft.	Seamless			40	6061 Aluminum	5038K352	000000
						1 1/2 ft.	Seamless			40	6061 Aluminum	5038K619	000000
						3 ft.	Seamless			40	6061 Aluminum	5038K63	000000
						6 ft.	Seamless			40	6061 Aluminum	5038K28	000000




										6 Pipe Size

1 ft.	Seamless									40	6061 Aluminum	5038K715	000000


3 ft.	Seamless									40	6061 Aluminum	5038K717	000000
6 ft.	Seamless									40	6061 Aluminum	5038K179	000000

Medium-Pressure Aluminum Butt-Weld Pipe Fittings

Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. Fittings are lightweight with good corrosion resistance.

Straight Reducers

Butt Weld × Butt Weld

	Pipe Size
	(A)	(B)	Construction	Pipe Schedule	Material		Each
Butt Weld × Butt Weld



		3/4	1/2	Seamless	40	6061 Aluminum	43485K111	0000000


		1	3/4	Seamless	40	6061 Aluminum	43485K112	000000
		1 1/2	1	Seamless	40	6061 Aluminum	43485K113	000000
		2	1 1/2	Seamless	40	6061 Aluminum	43485K114	000000
		3	2	Seamless	40	6061 Aluminum	43485K115	000000
		4	3	Seamless	40	6061 Aluminum	43485K116	000000

90° Elbow Connectors

Butt Weld

	Construction	OD	Pipe Schedule	Material		Each
Butt Weld



	1/2	Seamless	27/32"	40	6061 Aluminum	43485K119	0000000


	3/4	Seamless	1 3/64"	40	6061 Aluminum	43485K121	000000
	1	Seamless	1 5/16"	40	6061 Aluminum	43485K122	000000
	1 1/4	Seamless	1 21/32"	40	6061 Aluminum	43485K123	000000
	1 1/2	Seamless	1 29/32"	40	6061 Aluminum	43485K124	000000
	2	Seamless	2 3/8"	40	6061 Aluminum	43485K125	000000
	2 1/2	Seamless	2 7/8"	40	6061 Aluminum	43485K126	000000
	3	Seamless	3 1/2"	40	6061 Aluminum	43485K127	000000
	4	Seamless	4 1/2"	40	6061 Aluminum	43485K131	000000

45° Elbow Connectors

Butt Weld

	Construction	OD	Pipe Schedule	Material		Each
Butt Weld



	1/2	Seamless	27/32"	40	6061 Aluminum	43485K149	000000


	3/4	Seamless	1 3/64"	40	6061 Aluminum	43485K151	00000
	1	Seamless	1 5/16"	40	6061 Aluminum	43485K152	00000
	1 1/4	Seamless	1 21/32"	40	6061 Aluminum	43485K153	000000
	1 1/2	Seamless	1 29/32"	40	6061 Aluminum	43485K154	00000
	2	Seamless	2 3/8"	40	6061 Aluminum	43485K155	00000
	2 1/2	Seamless	2 7/8"	40	6061 Aluminum	43485K156	000000
	3	Seamless	3 1/2"	40	6061 Aluminum	43485K157	000000
	4	Seamless	4 1/2"	40	6061 Aluminum	43485K161	000000

Tee Connectors

Butt Weld

	Construction	OD	Pipe Schedule	Material		Each
Butt Weld



	3/4	Seamless	1 3/64"	40	6061 Aluminum	43485K171	0000000


	1	Seamless	1 5/16"	40	6061 Aluminum	43485K172	000000
	1 1/4	Seamless	1 21/32"	40	6061 Aluminum	43485K173	000000
	1 1/2	Seamless	1 29/32"	40	6061 Aluminum	43485K174	000000
	2	Seamless	2 3/8"	40	6061 Aluminum	43485K175	000000
	2 1/2	Seamless	2 7/8"	40	6061 Aluminum	43485K176	000000
	3	Seamless	3 1/2"	40	6061 Aluminum	43485K177	000000
	4	Seamless	4 1/2"	40	6061 Aluminum	43485K181	000000

Caps

Butt Weld

	Construction	OD	Pipe Schedule	Material		Each
Butt Weld



	1	Seamless	1 5/16"	40	6061 Aluminum	43485K192	0000000


	1 1/4	Seamless	1 21/32"	40	6061 Aluminum	43485K193	000000
	1 1/2	Seamless	1 29/32"	40	6061 Aluminum	43485K194	000000
	2	Seamless	2 3/8"	40	6061 Aluminum	43485K195	000000
	2 1/2	Seamless	2 7/8"	40	6061 Aluminum	43485K196	000000
	3	Seamless	3 1/2"	40	6061 Aluminum	43485K197	000000
	4	Seamless	4 1/2"	40	6061 Aluminum	43485K201	000000

Low-Pressure Aluminum Unthreaded Pipe Flanges

Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.

Flanges


Front	Flat Surface on Back

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



		1/2	1/2	Flat	3 1/2"	1/2"	5/8"	4	2 3/8"	125	356 Aluminum	150 psi @ 72° F	44705K543	000000


		3/4	3/4	Flat	3 7/8"	1/2"	5/8"	4	2 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K544	00000
		1	1	Flat	4 1/4"	1/2"	5/8"	4	3 1/8"	125	356 Aluminum	150 psi @ 72° F	44705K545	00000
		1 1/2	1 1/2	Flat	5"	1/2"	5/8"	4	3 7/8"	125	356 Aluminum	150 psi @ 72° F	44705K547	000000
		2	2	Flat	6"	5/8"	3/4"	4	4 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K548	000000
		2 1/2	2 1/2	Flat	7"	5/8"	3/4"	4	5 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K549	000000
		3	3	Flat	7 1/2"	5/8"	3/4"	4	6"	125	356 Aluminum	150 psi @ 72° F	44705K551	000000
		4	4	Flat	9"	5/8"	3/4"	8	7 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K552	000000
		6	6	Flat	11"	3/4"	7/8"	8	9 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K553	000000


		Slip-On Weld Female



				1/2	1/2	Flat	3 1/2"	1/2"	5/8"	4	2 3/8"	125	356 Aluminum	150 psi @ 72° F	44705K37	00000


				3/4	3/4	Flat	3 7/8"	1/2"	5/8"	4	2 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K38	00000
				1	1	Flat	4 1/4"	1/2"	5/8"	4	3 1/8"	125	356 Aluminum	150 psi @ 72° F	44705K361	00000
				1 1/4	1 1/4	Flat	4 5/8"	1/2"	5/8"	4	3 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K362	00000
				1 1/2	1 1/2	Flat	5"	1/2"	5/8"	4	3 7/8"	125	356 Aluminum	150 psi @ 72° F	44705K363	00000
				2	2	Flat	6"	5/8"	3/4"	4	4 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K364	00000
				2 1/2	2 1/2	Flat	7"	5/8"	3/4"	4	5 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K365	00000
				3	3	Flat	7 1/2"	5/8"	3/4"	4	6"	125	356 Aluminum	150 psi @ 72° F	44705K366	00000
				4	4	Flat	9"	5/8"	3/4"	8	7 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K367	000000
				6	6	Flat	11"	3/4"	7/8"	8	9 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K542	000000
				8	8	Flat	13 1/2"	3/4"	7/8"	8	11 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K772	000000

Reducing Flanges


Slip-On Weld	Front	Flat Surface on Back

Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.

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

						Bolt Hole
	Pipe Size (A)	For Flange Pipe Size (B)	Flanged Connection Surface (B)	Flange OD	For Bolt Dia.	Dia.	No. Of	Bolt Circle Dia.	Pressure Class	Material	Max. Pressure @ Temp.		Each
Slip-On Weld Female



		3	4	Flat	9"	5/8"	3/4"	8	7 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K768	0000000


		6	8	Flat	13 1/2"	3/4"	7/8"	8	11 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K771	000000

Blind Flanges


Front	Flat Surface on Back

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



		1/2	Flat	3 1/2"	1/2"	5/8"	4	2 3/8"	125	356 Aluminum	150 psi @ 72° F	44705K531	000000


		3/4	Flat	3 7/8"	1/2"	5/8"	4	2 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K532	00000
		1	Flat	4 1/4"	1/2"	5/8"	4	3 1/8"	125	356 Aluminum	150 psi @ 72° F	44705K533	00000
		1 1/4	Flat	4 5/8"	1/2"	5/8"	4	3 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K534	00000
		1 1/2	Flat	5"	1/2"	5/8"	4	3 7/8"	125	356 Aluminum	150 psi @ 72° F	44705K535	00000
		2	Flat	6"	5/8"	3/4"	4	4 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K536	00000
		2 1/2	Flat	7"	5/8"	3/4"	4	5 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K537	00000
		3	Flat	7 1/2"	5/8"	3/4"	4	6"	125	356 Aluminum	150 psi @ 72° F	44705K538	000000
		4	Flat	9"	5/8"	3/4"	8	7 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K539	000000
		6	Flat	11"	3/4"	7/8"	8	9 1/2"	125	356 Aluminum	150 psi @ 72° F	44705K541	000000
		8	Flat	13 1/2"	3/4"	7/8"	8	11 3/4"	125	356 Aluminum	150 psi @ 72° F	44705K399	000000