Assembly in hardened assembly stud (VOMNW…)

 

Introduction

  • This instruction describes the pre-assembly of a cutting ring (SRD...VA) on the stainless steel pipe in the assembly stud and the finishing assembly of the cutting ring in the screw sleeve.

 

Preparation

  • Grease the thread and cone of the assembly stud and the thread of the union nut with HANSA-FLEX fitting grease.
  • Slide the union nut and cutting ring onto the pipe, making sure that the cutting ring is in the correct position; the cutting edges of the cutting ring must face towards the end of the pipe, otherwise assembly will be incorrect.

 

Cutting ring assembly

  • Tighten the union nut until the force required to turn it* increases noticeably; at the same time, push the pipe firmly against the limit stop in the assembly stud, otherwise the pipe will not be cut properly.
  • Tighten union nut 1 ¼ turns with the spanner.

 

Inspection

  • Disassemble the pipe or threaded connection and check that a clearly visible shoulder of cut material is present in front of the first (front) cutting edge. In this case, the cutting ring may be allowed to rotate, but must not move axially.

 

Assembly

  • Grease the threads of the union nut and the screw sleeve with HANSA-FLEX assembly grease. Thread the union nut onto the screw fitting until the force required to turn it* increases noticeably. Continue turning union nut about ½ turn with the spanner.

 

Re-assembly

 

  • Grease the threads of the union nut and the screw sleeve with HANSA-FLEX assembly grease. Thread the union nut onto the screw fitting until the force required to turn it* increases noticeably. Turn the union nut of the threaded connection or pipe about ¼ of a turn further with the spanner (tighten/tighten fully).

The cones of the assembly stud are subject to normal wear and must be checked at regular intervals with taper gauges. Each screw sleeve must be used only once for finishing assembly on the pipe; using the same sleeve again may impair its function.


It is not permitted to carry out pre-assembly in the screw sleeve!

Finishing assembly of manufacturer-assembled stainless steel threaded connectors in screw sleeve

  • In these threaded connections, the cutting ring has been pre-assembled by the manufacturer.
  • Check that the cutting ring is positioned and seated correctly, and that the shoulder of cut material is present.  
  • Grease the thread of the union nut, the cutting ring and the thread of the screw sleeve with HANSA-FLEX assembly grease.
  • Tighten the union nut until the force required to turn it increases noticeably*.
  • Tighten union nut about ½ turn, bracing the screw sleeve with a spanner.
Abb: 1/2 Umdrehung

We recommend switching to HANSA-FLEX sealing cone screw-on fittings.