Page 393 - Mechanical Products Installation Handbook IH-1000M
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PRESSURE & DESIGN DATA 385 Pipe Support
Vertical Piping
Risers comprised of rigid couplings are similar to welded or flanged systems. Where thermal movement exists, expansion joints and/or flexible couplings with offsets may be required.
When using flexible couplings, the movement that occurs in long lengths of piping needs to be considered. Each joint can move up to the maximum pipe end separation published. This movement can accumulate and result in the growth of the piping system. Offsets may be necessary.
Should the riser contain branch connections, the movement that occurs at these locations with flexible couplings, will need to be considered.
One solution would be to anchor the vertical piping at appropriate loca- tions to prevent movement that can cause stresses at the branches or equipment.
As always, good piping practice should prevail. It is the Designer’s responsibility to select products suitable for the intended service and to ensure that pressure ratings and performance data is not exceeded. Never remove any piping component nor correct or modify any piping deficiencies without first de-pressurizing and draining the system. Material and gasket selection should be verified to be compatible for the specific application.
• Refer to Technical Data Sheets G810, G820, and G830 for more information.
