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Seamless Carbon Steel Tubing, 0.25 Inch OD, 0.05 Inch Thick, 0.15 Inch ID

Burst Pressure 21560	Brand Marmon/Keystone	Brand Marmon - Keystone	Pack Size 12.00	UOM FT	I.D. 0.152 in	Inside Area 0.02	Maximum Working Pressure 3593	O.D. 0.25 in	Rated Flow 0.80	Safety Factor 6:1	Supplier Part Number 1/4.049	Wall Thickness 0.05	Alternate Part Numbers Alternate Part Number C1AF29, Alternate Part Number MI-08763852, Alternate Part Number MINO-01965X80008	Product Weight 0.23 lbs

Product Questions & Answers 3

Product Questions & Answers

what kind of pressure can this tubing handle before I run into trouble? looking for the working max.

Question by: Jimmy K on Mar 16, 2026, 4:09 PM

Rated for a maximum working pressure of 3593 psi, the line provides a very strong safety margin. A 6:1 safety factor means the actual burst pressure reaches up to 21560 psi to help protect your system against severe spikes.

Answer by: Customer Support on Mar 17, 2026, 9:23 PM

tubing says it's annealed -- does that mean it'll bend without cracking or do I still need a tube bender on the smaller radius stuff?

Question by: Janet C on Feb 28, 2026, 7:29 PM

Annealing is specifically what makes this tubing cooperative for bending and flaring work. The SAE J524 spec requires it to be in that softened state, so the material has enough ductility to handle forming without fracturing along the bend. A proper tube bender is still the right call for tight-radius work, but the annealed condition means you're not fighting a stiff, work-hardened tube that wants to kink or split on you.

Answer by: Customer Support on Mar 2, 2026, 6:19 AM

Hey, can this tubing handle a good bit of pressure? I'm working on a project where things can get pretty intense.

Question by: Duane A on Apr 26, 2025, 5:25 PM

Based on SAE J1065, it can handle a maximum working pressure of 3593 psi. The burst pressure is rated much higher, at 21560 psi.

Answer by: Customer Support on Apr 27, 2025, 6:55 PM

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Model Number	O.D.	Wall Thickness	I.D.	Inside Area	Rated Flow	Maximum Working Pressure	Burst Pressure	Safety Factor
1/2.049	0.5 in	0.049	0.402 in	0.1269	6	1797	10780	6:1
1/2.065	0.5 in	0.065	0.37 in	0.1075	4.9	2383	14300	6:1
1/4.049	0.25 in	0.049	0.152 in	0.0181	0.8	3593	21560	6:1
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3/8.065	0.375 in	0.065	0.245 in	0.0471	2.6	3178	19067	6:1
5/8.095	0.63 in	0.095	0.435 in	0.1485	6.9	2787	16720	6:1
1-1/4.095	1.25 in	0.095	1.06 in	0.882	41	1393	8360	6:1
1-1/4.120	1.25 in	0.12	1.01 in	0.8008	36.7	1760	10560	6:1
1.065	1 in	0.065	0.87 in	0.5942	28.1	1192	7150	6:1
1.120	1 in	0.12	0.76 in	0.4534	20.7	2200	13200	6:1
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3/16.035	0.1875 in	0.035	0.1175 in	0.0108	0.4	3422	20533	6:1
3/4.049	0.75 in	0.049	0.652 in	0.3337	15.4	1198	7187	6:1
3/4.065	0.75 in	0.065	0.62 in	0.3018	12	1589	9533	6:1
3/4.095	0.75 in	0.095	0.56 in	0.2462	11	2322	13933	6:1
3/4.109	0.75 in	0.109	0.532 in	0.2222	10.6	2664	15987	6:1
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