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Single Line Corrugated Welding, Grade R

The Flex Strength® Single Line Corrugated Welding hose is lightweight, flexible and available from stock in a wide range of sizes. The hoses come in two popular grades, R and T. Both grades come in single line and tuline styles, with or without corrugated covers. Each of these styles and grades feature multi-spiral construction for maximum kink resistance. The Grade R hose features an EPDM tube and cover that are heat resistant.

Technical Overview

Cover Color ■ Red/Green
Oil Resistance ■ Limited – (Acetylene Only)
Construction ■ Tube: EPDM
■ Cover: EPDM
■ Reinforcement: Spiral polyester yarn
Temperature Range ■ -40°F to +180°F, -40°C to +82°C
Packaging ■ Reels, Cut and coupled lengths


Thermoid Catalog – Single Line Corrugated Welding, Grade R


Cancer and Reproductive Harm –

Features & Benefits

  • Heat Resistant
EPDM Cover
  • Heat Resistant
2- or 4- Spiral Polyester Yarn Reinforcement
  • Provides Working Pressure to 200 psi, Regardless of I.D.
  • Kink Resistant
  • More Flexible than Braid Reinforced Hose
  • Easier to Route
  • Easier to Coil and Handle
  • Less Susceptible to Premature Failure than Braided Hose if Subjected to Torque
Pressureless Cure System
  • Minimal Cast (Natural Curvature of the Hose)
  • Extends the Life of the Rubber Compounds
Air Mandrel Manufacturing Process
  • Conforms to RMA/CGA Specifications
  • No Internal Contamination of the Inside Diameter Due to the Lubricant
  • Eliminates the Need for the Customer to Flush the Hose
  • Capable of Bonding Red and Green Hoses
Multi-Ventilating Pores
  • Disperses Permeating Gases
  • Enhances Welder’s Safety
500-700FT Reels
  • Over 80% One Piece Reel
  • Less Scrap
  • Most Footage per Reel vs. Competition