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HY-FLEX Grade D Rotary Drilling

Recommended for the high pressure rotary drilling requirements of API Spec 7K and ISO 6807, this hose is also used in higher pressure applications which exceed the capabilities of the Grade C Rotary Drilling hose, and for the flexible connection between standpipe and swivel for pumping mud at very high pressure in oil drilling and exploration. The HY-FLEX Grade D Rotary Drilling hose features multiple plies of high strength bead wire reinforcement to exceed the minimum burst requirements of 12,500 psig, yet provide for the maximum hose flexibility.

Technical Overview

Cover Color ■ Black
Oil Resistance ■ High
Construction ■ Tube: NBR, RMA Class A
■ Cover: CR, Class C
■ Reinforcement: Multiple plies of bead wire
   (8 or 10) and synthetic cord fabric
Temperature Range ■ -20°F to +200°F, -29°C to +93°C
Packaging ■ Lengths over 30 ft. shipped on metal reels
   Shorter pieces shipped straight – slat packed
Couplings ■ Only uncoupled hose is available at this time


Thermoid Catalog – HY-FLEX Grade D Rotary Drilling

Features & Benefits

NBR, RMA Tube – Class A
  • High Oil Resistance
  • Weather Resistant
  • Heat Resistant
CR, RMA Cover – Class C
  • Medium Oil Resistance
  • Weather Resistant
  • Abrasion Resistant
8- to 10-Ply of Bead Wire, a Synthetic Cord Fabric Reinforcement
  • Provides a Very High Working Pressure at 5000 psi, Regardless of Size
  • Exceeds the Capabilities of the Grade C Hose
Meets Spec 7K and ISO 6807
  • Meets All the Industries Performance Requirements