AWS G1.10M pdf free download

AWS G1.10M pdf free download.Evaluation of Thermoplastic Welds.
electrofusion welding (EFW). A thermoplastic welding process where the heat for welding is provided by energizing an electrically resistive coil in the weld zone.
extrusion welding (EX). A joining process in which molten thermoplastic material is forced against preheated workpieces to produce the weld.
fan welding (HF). A hot gas welding method where the weld rod is fed into the joint without the aid of a welding nozzle; the pressure is applied directly to the welding rod by the welder.
flaw. An interruption of the typical structure of a material, such as lack of homogeneity in its structure or physical characteristics. A flaw is not necessarily a defect.
flow fusion welding. A variety of beadless welding techniques in which resultant joints are free from internal and external beads and crevices. The primary method of beadless welding involves careful diffusion of heat through the external surfaces while maintaining internal support of material as it becomes molten. The Welding Procedure Specification (WPS) specifies the heating temperature and heating cycle during which the molten material readily joins as a single piece.
heated tool butt welding (HT). A method for joining the ends of thermoplastic pipe or fittings in which a hot tool is placed between the pipe ends for a predetermined heating time and then the ends are pushed together with a predetermined amount of force until the joint cools.
hot gas welding (HGW). A thermoplastic welding process in which the parts are softened by hot gas and joined together.
lack of fusion. In a weld, any area or zone that lacks melting and coalescence (fusion) of a portion of the weld. This may occur between weld passes or between weld and base materials.
scraping. The process of removing a thin layer of polymer from the surface to be welded in order to eliminate surface contamination and oxidation.
shrinkage groove. Insufficiency of material on the lateral edges of the weld due to the high them’ial shrinkage or expansion characteristics of thermoplastics; this resembles an undercut or underfill weld.
socket fusion welding (SFW). A heated tool welding process variation in which the tool is configured to heat the outside of one workpiece and the inside of the other.
speed welding (HS). A hot gas welding process variation in which the welding tip is used to feed and heat the welding filler rod while heating the workpieces and forcing the plasticized filler into the fusion zone.
void. An unfilled space within a weld.
4. Evaluation Groups
4.1 Classification. Specific requirements are established for the intended service of a component, particularly regarding the quality of the welded joints. The following classification is used as a basis, so that the fabricator and inspector know the extent of the measures required for quality control with regard to welding.
7. Testing and Evaluation
Visual inspection, measurements and, where necessary, suitable non-destructive or destructive testing procedures should be used to verify that the acceptance criteria for the individual welding groups have been met. Testing can be carried out on the welded joints of the component. Specific characteristics can also be verified on test pieces that are fabricated under comparable conditions. The nature and extent of the tests, together with their timing. should be agreed upon between the customer and the fabricator. The test results should be documented.
AWS G1.10M pdf download.