{"product_id":"l51660-development-of-simplified-weld-cooling-rate-models-for-in-service-gas-pipelines","title":"L51660 Development of Simplified Weld Cooling Rate Models for In-Service Gas Pipelines","description":"\u003cp\u003eFor some time, the gas transmission industry has been faced with the problem of standardizing guidelines for welding on \"in-service\" pipelines. Such guidelines would permit the welding engineer to safely and accurately assess field operations either prior to or during welding.\u003c\/p\u003e\n\n\u003cp\u003eEdison Welding Institute (EWI) and Battelle Memorial Institute (Battelle) separately developed models for predicting hot-tap\/repair welding conditions for \"in-service\" pipelines. EWI researchers developed a field-adaptable technique for \"in-service\" welding of pipelines that requires actual field measurement of the pipeline's heat-sink capacity. The measured value, in conjunction with extensive experimental field data allows the assessment of acceptable welding procedures to avoid underbead cracking. Battelle researchers devised a different approach to the problem of \"in-service\" welding. Thermal-analysis computer models were devised that determine acceptable welding parameters to avoid cracking and burnthrough based on heat-transfer equations. Both of the original EWI and Battelle methods were validated through extensive field trials. The result of this work by EWI, Battelle and Kiefner \u0026amp; Associates integrated these two (2) methods into a single \"standard\" approach suitable for predicting safe welding procedures for welds made on \"in-service\" pipelines. This report describes the field-adaptable technique, the thermal-analysis models and the validating experimental data. This report further delineates how the EWI and Battelle hot-tap methods were integrated into a new approach to welding on \"in-service\" pipelines.\u003c\/p\u003e","brand":"PRCI Store","offers":[{"title":"Default Title","offer_id":44361977266254,"sku":"15616","price":1195.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/prci-store.myshopify.com\/products\/l51660-development-of-simplified-weld-cooling-rate-models-for-in-service-gas-pipelines","provider":"PRCI Store","version":"1.0","type":"link"}