Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: Heat Fusion Guidelines-A Study Of Strength As A Function Of Joining Conditions For Butt, Socket, And Saddle Fusion
Author: Sudheer m. Piputkar
Source: American Gas Association 1990
Year Published: 1990
Abstract: The most common method of joining polyethylene pipe used in gas distribution applications is by heat fusion. Butt joints, socket joints, and saddle joints are common heat fusion joints and are discussed here. Typically, when fusing polyethylene, surfaces to be joined are heated, melted, and then held together under pressure. The heating temperature, heating time, interfacial pressure, cooldown time, and other joining specifications are recommended by the manufacturer of the polyethylene pipe. If these recommended procedures are followed, strong joints can be expected. However, the consequences of deviations from recommended joining procedures, no matter how inadvertent, are not definitively known. In particular, it is not clear which variables are more critical to proper joining and how great the deviations from recommended practice have to be in order to produce an unacceptable joint. A semi-empirical approach was used to relate the strength of the heat fusion joints to the joining conditions. In this approach, the macroscopic thermofluid consequences of the joining conditioners were determined by using theoretical models that were validated by use of extensive measured data. Strength of the joints was defined by mechanical tests that gauged the integrity of the fusion interface. Examination of the thermal and flow parameters for butt and socket joints indicated that they could be combined into one (joining) parameter that described the thermofluid effects of material, pipe size, and joining conditions. It is expected that a similar joining parameter will be found for saddle joints.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.