PIPELINE PIGGING TECHNOLOGY- P3: Why pig a pipeline? This paper introduces a number of reasons for doing so, together with a discussion of the advantages and alternatives. In general terms, however, pigging is not an operation to be undertaken lightly. There are often technical problems to be resolved and the operation requires careful control and co-ordination. | Pipeline Pigging Technology . FEDERAL PIPELINE SAFETY REGULATIONS METHOD J. 2. METHOD lubpert K Uprudwg Scope. General requirement . Upratlng to a pressure that will produce a hoop siren of 30 percent or more of SMYS in steel pipeline . Upratlng Steel pipeline to a pressure that will produce a hoop siren leas than 30 percent of SMYS plastic cast Iron and ductile Iron pipelines. Scope. General provision . Essential of operating and maintenance plan. Initial determination of clan location and confirmation or establishment of maximum allowable operating pressure. Change In clan location Required study. Change In clan location Confirmation or revision of maximum allowable operating pressure. Continuing surveillance. Damage prevention program. Emergency plans. 19X617 Investigation of failures. 19X619 Maximum allowable operating pressure Steel or plastic pipelines. 19X621 Maximum allowable operating pressure High-pressure distribution system . Maximum and minimum allowable operating pressure Low-pressure distribution systems. Odorization of gas. Tapping pipelines under pressure. Purging of pipelines. Subport M M brt w nco 19X701 Scope. General. 19X705 Transmission lines Patrolling. 19X706 Transmission lines Leakage survey . 19X707 Line markers for mains and trans mission line . 19X709 Transmission lines Record keeping. 19X711 Transmission lines General requirement for repair procedures. 19X713 Transmission lines Permanent field repair of imperfection and damage . Transmission lines Permanent field repair of welds. 19X717 Transmission lines Permanent field repair of leaks. 19X719 Transmission lines Testing of repair . 19X721 Distribution systems Patrolling. 19X723 Distribution systems Leakage survey and procedure . 19X735 Test requirements for reinstating service line . 19X737 Abandonment or inactivation of fa-cUttie .
