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Seamless Carbon Steel Tubing, 1.25 Inch OD, 0.12 Inch Thick, 1.01 Inch ID

Description & Features

Seamless carbon steel tubing with an outer diameter of 1.25 inches, wall thickness of 0.12 inches, and inner diameter of 1.01 inches. Designed for durability, this tubing adheres to SAE J524 specifications, ensuring high tensile strength at 55,000 psi.

Rated with a burst pressure of 10,560 psi and a maximum working pressure of 1,760 psi, this tubing guarantees reliable performance in demanding industrial environments. Its application spans across various sectors requiring robust and precise tubing solutions.

The inside area measures 0.8008 insup2;, facilitating a rated flow of 36.7. The adherence to the more conservative Barlow formula assures the integrity and safety of the product, prioritizing worksite protection with a safety factor of 6:1.

For bending and flaring needs, the tubing material is annealed low carbon steel, optimal for complex installations. The tubing also provides a versatile solution for air brake and fluid transfer systems, meeting industry standards for quality and performance.

Supplier Part Number: 1-1/4.120

Specifications

Burst Pressure 10560	Brand Marmon/Keystone	Brand Marmon - Keystone	Pack Size 12.00	UOM FT	I.D. 1.01 in	Inside Area 0.80	Maximum Working Pressure 1760	O.D. 1.25 in	Rated Flow 36.70	Rated Flow 36.7	Safety Factor 6:1	Supplier Part Number 1-1/4.120	Wall Thickness 0.12	Alternate Part Numbers Alternate Part Number C1AE34, Alternate Part Number MI-08763764, Alternate Part Number MINO-01965X80003	Product Weight 0.82 lbs

Similar Products

Model Number	O.D.	Wall Thickness	I.D.	Inside Area	Rated Flow	Maximum Working Pressure	Burst Pressure	Safety Factor
1/2.049 Seamless Carbon Steel Tubing	0.5 in	0.049	0.402 in	0.1269	6	1797	10780	6:1
1/2.065 Seamless Carbon Steel Tubing	0.5 in	0.065	0.37 in	0.1075	4.9	2383	14300	6:1
1/4.049 Seamless Carbon Steel Tubing	0.25 in	0.049	0.152 in	0.0181	0.8	3593	21560	6:1
3/8.049 Seamless Carbon Steel Tubing	0.375 in	0.049	0.277 in	0.0602	2.8	2396	14373	6:1
3/8.065 Seamless Carbon Steel Tubing	0.375 in	0.065	0.245 in	0.0471	2.6	3178	19067	6:1
5/8.095 Seamless Carbon Steel Tubing	0.63 in	0.095	0.435 in	0.1485	6.9	2787	16720	6:1
1-1/4.095 Seamless Carbon Steel Tubing	1.25 in	0.095	1.06 in	0.882	41	1393	8360	6:1
1-1/4.120 Seamless Carbon Steel Tubing	1.25 in	0.12	1.01 in	0.8008	36.7	1760	10560	6:1
1.065 Seamless Carbon Steel Tubing	1 in	0.065	0.87 in	0.5942	28.1	1192	7150	6:1
1.120 Seamless Carbon Steel Tubing	1 in	0.12	0.76 in	0.4534	20.7	2200	13200	6:1
1/2.083 Seamless Carbon Steel Tubing	0.5 in	0.083	0.334 in	0.0876	4	3043	18260	6:1
3/16.035 Seamless Carbon Steel Tubing	0.1875 in	0.035	0.1175 in	0.0108	0.4	3422	20533	6:1
3/4.049 Seamless Carbon Steel Tubing	0.75 in	0.049	0.652 in	0.3337	15.4	1198	7187	6:1
3/4.065 Seamless Carbon Steel Tubing	0.75 in	0.065	0.62 in	0.3018	12	1589	9533	6:1
3/4.095 Seamless Carbon Steel Tubing	0.75 in	0.095	0.56 in	0.2462	11	2322	13933	6:1
3/4.109 Seamless Carbon Steel Tubing	0.75 in	0.109	0.532 in	0.2222	10.6	2664	15987	6:1
5/8.065 Seamless Carbon Steel Tubing	0.63 in	0.065	0.495 in	0.1923	9	1907	11440	6:1

Product Questions & Answers (2)

Question by: Brent G on Apr 28, 2025, 3:37 PM

what's the max working pressure on this tubing? got a system running around 1,400 psi and want to make sure it'll hold up without issues

Answer by: Customer Support on Apr 30, 2025, 6:06 AM

At 1,760 psi maximum working pressure, that 1,400 psi system sits comfortably within range. Worth knowing that figure already accounts for a 6:1 safety factor, which is the standard applied for conditions where hydraulic shock and mechanical strain are considered considerable. If your setup runs into more severe shock loads, the rated working pressure would need to be pulled back further to reflect an 8:1 safety factor. For routine fluid transfer or air brake applications without heavy shock, you're in good shape at that operating pressure.

Question by: Ray B on Sep 30, 2025, 9:09 PM

got a line that needs 1-1/4 OD steel tube. is this one actually 1.25 OD with a 0.120 wall, or am i readin it wrong

Answer by: Customer Support on Oct 2, 2025, 7:16 AM

Dimensional-wise, it is 1.25 inch outside diameter with a 0.12 inch wall thickness, which puts the inside diameter at 1.01 inch.