Delamination Cutters for PVC-lined Steel Pipes

Overview

The delamination cutters do not require any specific skills to delaminate the polyvinyl chloride (PVC) lining of PVC-lined steel pipes.

Purpose of development

During construction work using PVC-lined steel pipes, it is necessary to delaminate the PVC lining of connection parts. Previously, a flathead driver and a hammer were used to chip off the lining.However, there was a risk of damaging the pipe. The construction quality decreased due to differences in workers’ skills. Scattering of lining fragments raised safety concerns.It also took time to remove tiny fragments of lining that remained on the pipe surface.Against this backdrop, we developed delamination cutters, which do not require any specific skills to operate, attain stable construction quality, and can be used in a narrow space.

Types and structures

There are two types of delamination cutters. One is the pipe end delamination type, which is used for newly installed pipes, etc., and the other is the intermediate part delamination type, which is used for branch stubs, etc. from existing piping.

Features

• A ratchet mechanism (which applies force only in one rotational direction by engaging a gear with a pawl and allows free rotation in the opposite direction) is used for both types so that the cutters can be used in a narrow space.
• The main unit of the tools is not equipped with a feeding mechanism. We developed a unique structure that feeds a pipe only with the cutter, while delaminating the lining spirally.
• The work procedure is simple: set a cutter to a pipe and turn the cutter.
• Delamination of about 15 cm takes two to three minutes. The time required is one-third that of the conventional process.
• Construction is possible if the distance between the pipe and the wall is 3 cm or more.

Specifications

Pipe end delamination type: 25A〜100A
Intermediate part delamination type: 25A, 32Ac
Target pipe type: PVC-lined steel pipes (adhesive type)
Usage environment temperature: −5°C to 50°C