Welding Industrial Hoses | Parker | Grade R Single Line Welding Hose | 7120/7121/7031R Series
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Series 7120/7121 is a single line acetylene/oxygen welding hose. Red Series 7120 is only for fuel service and is compatible only with acetylene. Green Series 7121 is only for oxygen service. The non-blooming tube minimizes the migration of combustible waxes or plasticizers to the surface of the rubber, and the multiple plies of textile reinforcement provide flexibility. Single line welding hose is available in long continuous lengths, providing maximum versatility and ease of handling in a variety of applications where only single line hose is needed or where the fuel gas and oxygen are separated, and twin line hose is not practical. The cover is resistant to abrasion, heat, mild chemicals and ozone.
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Series 7120 (Red - Acetylene line only)
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Part # |
ID (in) | Reinf Plies |
OD (in) | Min Bend Rad (in) | Max Rec WP (psi) | Perm Cplg Rec* |
| 7120-19200 | 3/16 | 2 | 0.438 | 2.0 | 200 | * |
| 7120-25200 | 1/4 | 2 | 0.531 | 2.5 | 200 | * |
| 7120-31200 | 5/16 | 2 | 0.594 | 3.0 | 200 | * |
| 7120-38200 | 3/8 | 2 | 0.656 | 4.0 | 200 | * |
| 7120-50200 | 1/2 | 4 | 0.875 | 5.0 | 200 | * |
*Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications.
Series 7171/7031R (Green - Oxygen line)
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Part # |
ID (in) | Reinf Plies |
OD (in) | Min Bend Rad (in) | Max Rec WP (psi) | Perm Cplg Rec* |
| 7121-19200 | 3/16 | 2 | 0.438 | 2.0 | 200 | * |
| 7121-25200 | 3/16 | 2 | 0.531 | 2.5 | 200 | * |
| 7121-31200 | 1/4 | 2 | 0.594 | 3.0 | 200 | * |
| 7121-38200 | 5/16 | 2 | 0.656 | 4.0 | 200 | * |
| 7120-50200 | 1/2 | 4 | 0.875 | 5.0 | 200 | * |
| 7031-75304R | 3/4 | 4 | 1.156 | 6.0 | 300 | HY |
| 7031-7530450R | 3/4 | 4 | 1.156 | 6.0 | 300 | HY |
*Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications.