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Applications

• Bending, brazing, cutting, fabricating, gouging, joining, piercing, pre-heating, post-heating, severing, soldering, straightening, surfacing, trimming

• Assembly and fabrication shops, construction, factories, foundries, mines, oil rigs, plumbing, rail yards, salvage, scrapyards, shipyards, steel mills

Grade R Single Line Welding Hose - ARPM IP-7

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 sources are separated, and twin line hose is not practical. The cover is resistant to abrasion, heat, mild chemicals and ozone.

NOTES:
• For 3/4" Grade R oxygen hose, refer to Series 7031(R).
• Grade R is also suitable for use with inert gas.
• Refer to Technical Resources>Guides & Tables for fuel compatibility and service conditions.

Tube: Black EPDM
Reinforcement: Multiple textile plies
Cover: Series 7120: Red (acetylene) EPDM; ribbed finish
Series 7121: Green (oxygen) EPDM; ribbed finish
(7031R Green EPDM; smooth finish)
Temp. Range: -40°F to +200°F (-40°C to +93°C)
Brand Method: Series 7120: White ink
Series 7121/7031(R): Black ink
Brand Example: Series 7120: PARKER 7120 WELDING WARNING ACETYLENE ONLY (ID) MAX WP 200 PSI ARPM IP-7-(YEAR) STD DUTY GRADE R COUPLE WITH ONE INCH FERRULES MADE IN USA (DATE CODE)
Series 7121: PARKER 7121 WELDING WARNING OXYGEN (ID) MAX WP 200 PSI ARPM IP-7-(YEAR) STD DUTY GRADE R COUPLE WITH ONE INCH FERRULES MADE IN USA (DATE CODE)
Series 7031(R): PARKER 7031 GST® II/OXYGEN (ID) MAX WP 300 PSI (200 PSI OXYGEN) ARPM IP-7-(YEAR) STD DUTY GRADE R MADE IN USA (DATE CODE)
Design Factor: 4:1
Industry Standards: ARPM IP-7
Vacuum: Not recommended
Compare to: Thermoid Green GP/Oxygen
Packaging: Reels

 
 
Part No. ID
(in)
ID
(mm)
Reinf.
Plies
OD
(in)
OD
(mm)
Approx.
Wt. (lbs/ft)
Min.
Bend
Rad (in)
Max.
Rec.
WP (psi)
Perm
Cplg
Rec *
Std
Pack
Qty (ft)
Stock
Status
**
7031-7530450R 3/4 19.1 4 1.156 29.4 0.37 6 300 HY 50 Y
7031-75304R 3/4 19.1 4 1.156 29.4 0.37 6 300 HY 400 Y
7120-19200 3/16 4.8 2 0.438 11.1 0.08 2 200 * 800 Y
7120-25200 1/4 6.4 2 0.531 13.5 0.1 2.5 200 * 800 Y
7120-31200 5/16 7.9 2 0.594 15.1 0.13 3 200 * 750 Y
7120-38200 3/8 9.5 2 0.656 16.7 0.14 4 200 * 700 Y
7120-50200 1/2 12.7 4 0.875 22.2 0.26 5 200 * 500 N
7121-19200 3/16 4.8 2 0.438 11.1 0.08 2 200 * 800 Y
7121-25200 1/4 6.4 2 0.531 13.5 0.1 2.5 200 * 800 Y
7121-31200 5/16 7.9 2 0.594 15.1 0.13 3 200 * 750 Y
7121-38200 3/8 9.5 2 0.656 16.7 0.14 4 200 * 700 Y
7121-50200 1/2 12.7 4 0.875 22.2 0.26 5 200 * 500 Y

Table Notes 
* Industrial Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications.
Welding Couplings: As specified in CGA publication E-1. Bulk welding hose couplings are not sold separately by Parker (except 3/4")
** Stock: “Y” indicates stocked item; “N” indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service.









WARNING! Do not attempt to re-couple, repair or splice hose assemblies; replace all assemblies that show signs of abrading, abuse, age, damage or fatigue. Refer to ARPM IP-7, Specifications for Rubber Welding Hose and Hose Technical Bulletin 11-5, Guide for Use, Maintenance and Inspection of Welding Hose. Refer to CGA Safety Bulletin SB-11, Use of Rubber Welding Hose.