Applying ASME Code Slurry Transportation Piping Systems an ANSI Standard

Abstract

Most installations of mine backfill slurry pipeline distributions systems, including both hydraulicand pastefills do not meet all the requirements of any specific pressure system code. This occursfor a variety of reasons from the lack of a specific code requirement, non-compliance with a code,changes in operating procedures, process changes, temporary repairs, incorrect pipingcomponents, and lack of knowledge of applicable codes.In North America, specifically the USA, there is a designated code and an ANSI standard –ASME Code B31.11 Slurry Transportation Piping Systems. Generally this code is not well knownand like most codes is not readily available or easily interpreted by field personnel. With theincreasing use of backfill and the extraction of ore at greater depths, there is a growing concernabout the safety and liability of non-standard piping installations.Hatch has been retained by two separate mining clients to review, certify and provideengineering standards for backfill distribution systems. This includes installation drawings,material specifications and computer analysis to calculate allowable pressures and loads forvarious piping components. To further ensure continued compliance, instructive training forsupervisory personnel and tradesman was offered after the delivery of the engineering documents.This presentation identifies the most common installation deficiencies and clarifiesmisconceptions about the interpretation and compliance of this specific code. As the completecode is too extensive to cover in this presentation, it will highlight only some important clausesfor review and consideration by interested parties.