OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 12 General Safety Precautions

Section 188 Restraining hoses and piping

Hazards associated with hoses or piping and their connections operating under pressure are mainly the result of failures caused by leaks, pulsation, vibration, and excessive pressure. Besides the damage resulting from the release of high-pressure gases or liquids when a vessel or pipe ruptures, fatal injuries can result from the blowout of gauges and valves, and the uncontrolled whipping actions of pipes, tubing, and hoses.

In those cases where failure or disconnection could cause movement that endangers workers, the hoses or piping and their connections must be restrained (see Figure 12.3). Methods of restraint include wiring together hose connections, clamping or bracketing pipe sections, and securing restraint cables at the ends of hoses or pipe that function as loading spouts.

For hoses or piping systems and their connections operating at working pressures of 2000 kilopascals (290 pounds/square inch) or more, an alternative practice is permitted. This alternative requires the employer to ensure that the hoses or piping and their connections are designed, installed, used, inspected and maintained in accordance with the manufacturer’s specifications or specifications certified by a professional engineer.

In cases where this provision is used, the employer will be expected to have a copy of the appropriate set of specifications readily available at the work site for inspection by workers or an officer. Inspection and maintenance instructions are expected to include pass/fail criteria for the particular part or function inspected, as well as inspection and maintenance intervals. The employer should be prepared to provide workers and officers with documentation showing that the inspections and required maintenance were performed as required and that any substandard conditions were corrected.

Figure 12.3 Examples of how to restrain hoses and piping