LEAD-LOC & LEADLINE STRAIGHT CONNECTORS EXPLAINED.

A REPORT BY                       DATE

Sergio meli, B. Sc.(Hons.), Mech. Eng           1st February 2012

Manging Director.

Melimatic Limited

Introduction

There are a number of ways that two pipes can be connected together. The simplest method is by using a sleeve that is then soldered to each pipe. This is known as an "End Feed" fitting, "fitting" being the general term for all types of pipe connectors. The next level is still using solder to connect and seal the pipes but the solder is contained in the fitting during manufacture so that only flux & heat need to be applied during assembly. This is known as a "Capillary" fitting. "Compression" fittings are those where usually a metal body with threaded ends is utilised to connect the pipes. The pipes are then retained within it by "compressing" a sealing ring onto the pipe and forming a seal at the same time as providing a means of constraining the pipe. This is achieved by rotating the body and nut in opposite directions, thus bringing the parts together and compressing the seal between them. More recently other methods have been developed and introduced using metal and plastic, such as Push-in or Crimp-on type fittings.

Connectors for Repairs & Replacement of Lead Pipe.

The types examined here are compression type connectors for joining lead pipe to either copper or plastic pipe. Sometimes called straight couplings or fittings they are used to connect two pipes together axially. That is, the pipes are on the same plane & line, hence the classification, "straight". They are used for carrying water only.

Design & Performance Criteria.

The connector must satisfy the following criteria

1) Create a seal between the pipe or tube and itself so that no fluid escapes.

2) When tightened fully it must grip the pipe or tube so that it will not pull out of the connector in use.

3) Be made of such materials so that it suffers the minimum of erosion due to the external installation conditions or the internal fluid it carries.

4) Be made of such materials so that given the current state of opinion & knowledge they do not contaminate the fluid in contact with it.