CSG Facility Pipe Support Options:

Piping Stress Analysis Approach

AGIT Gas Speak Colloquium 2012

Clinton Glanville

Mechanical Engineer

Kellogg Brown & Root (KBR)

Agenda

• Why do we need pipe supports?

• Pipe Support Options

• CSG Pipeline Facilities

• Piping Stress Analysis

Pipe Supports

• 6 Degrees of Freedom

Lateral

Axial

Vertical

Piping Systems

• Coal Seam Gas Pipeline Facilities

– Pig Launchers & Receivers

– Filters

– Metering

– Vent Systems

– Tie-ins to other facilities

• Large Bore Piping (600mm+ Pipe Diameters)

• Equipment Load Limits

• Corrosion

• Isolation from Cathodic Protection (CP)

Pipe Supports: Rests

Saddle Welded Shoe Clamped Shoe

Pipe Supports: Anchors

Clamped Anchor

Pipe Supports: Struts, Stops, Guides

Guide with wear pad

Pipe Supports: Hangers

Constant-Effort Hanger Rigid Hanger

Spring Hanger

Piping Stress Analysis: An Introduction

• Safe piping designs

• Stresses

• Loadings

• Displacements

• Dynamic loadings

• Optimisation

Piping Stress Analysis: Software

Piping Stress Analysis: CAESAR II

Modelled Piping & Supports

Anchors: X, Y, Z, RX, RY, RZ

Double-acting

Vertical: Y Guide: Z

Spring

Hanger:

+Y

Piping Stress Analysis: CAESAR II

Operating: Weight, Pressure, Temperature

Piping Stress Analysis: CAESAR II

Sustained: Weight, Pressure

Piping Stress Analysis: Pipe Supports

Refining the Model:

• Gaps

• Friction

• Support Stiffness

• Load Cases

– Operating

– Sustained

• Reports

– Loads

– Displacements

• Stress Isometrics

– Support Types

– Locations

Piping Stress Analysis: Results

Loads Displacements

Piping Stress Analysis: Stress Isometric

Examples: Dummy Leg

Examples: U-Bolts & Teflon Pads

Examples: Not recommended

Examples: When it goes wrong

Examples: Piping disengagement

Summary

• Pipe supports have a major effect on piping system safety

and integrity

• Optimal pipe support and piping system design can

decrease project costs and prevent failure

Disclaimer

These materials contain information of a general nature and are

provided for discussion purposes only. They do not in any way represent

engineering advice and KBR does not warrant the accuracy,

completeness or currency of the information in these materials. Any

person who uses or relies on these materials does so entirely at their

own risk.

Thank you!

Clinton Glanville

Mechanical Engineer