Fiberglass Reinforced Piping Systems Guide

Fiber Glass Systems’(FGS) fiberglass reinforced epoxy and vinyl ester resin piping systems possess excellent corrosion resistance and a combination of mechanical and physical properties that offer many advantages over traditional piping systems. Fiber Glass Systems is recognized worldwide as a

leading supplier of piping systems for a wide range of chemical and industrial applications.

This manual is provided as a reference resource for some of the specific properties of FGS piping systems. It is not intended to be a substitute for sound engineering practices as normally employed by professional design engineers. 

Fiber Glass Systems has an international network of distributors and trained field personnel to advise on proper installation techniques. It is recommended they be consulted for assistance when installing FGS piping systems. This not only enhances the integrity of the piping system, but also increases the efficiency and economy of the installation.

Table of Contents

Introduction

Piping System Selection

SECTION 1 — Flow Properties

Preliminary Pipe Sizing

Detailed Pipe Sizing

A. Liquid Flow
B. Loss in Pipe Fittings
C. Open Channel Flow
D. Gas Flow

SECTION 2 — Above Ground System Design Using

Supports, Anchors & Guides

Piping Support Design

A. Support Bracket Design
B. Typical Guide Design
C. Anchor Design
D. Piping Support Span Design

SECTION 3 — Temperature Effects

System Design 

Thermal Properties and Characteristics 

Fundamental Thermal Analysis Formulas

A. Thermal Expansion and Contraction
B. Anchor Restraint Load
C. Guide Spacing 

Flexibility Analysis and Design

A. Directional Change Design
B. Expansion Loop Design
C. Expansion Joint Design
D. Heat Tracing
E. Thermal Conductivity
F. Thermal Expansion in Buried Pipe
G. Pipe Torque due to Thermal Expansion 

SECTION 4 — Pipe Burial 

Pipe Flexibility

Burial Analysis

A. Soil Types
B. Soil Modulus

Trench Excavation and Preparation

A. Trench Size
B. Trench Construction
C. Maximum Burial Depth
D. Roadway Crossing

Bedding and Backfill

A. Trench Bottom
B. Backfill Materials
C. Backfill Cover
D. High Water Table 

SECTION 5 — Other Considerations 

A. Abrasive Fluids
B. Low Temperature Applications
C. Pipe Passing Through Walls or
Concrete Structures
D. Pipe Bending
E. Static Electricity
F. Steam Cleaning
G. Thrust Blocks
H. Vacuum Service
I. Valves
J. Vibration
K. Fluid (Water) Hammer
L. Ultraviolet (U.V.) Radiation and Weathering
M. Fungal, Bacterial, and Rodent Resistance

SECTION 6 — Specifications and Approvals 

A. Compliance with National Specifications
B. Approvals, Listings, and Compliance with Regulations 

APPENDICES

Appendix A Useful Formulas 

Appendix B Conversions

LIST OF TABLES

• Table 1.0 Typical Applications 
• Table 1.1 Flow Resistance K Values for Fittings
• Table 1.2 Typical Liquid Properties
• Table 1.3 Typical Gas Properties
• Table 2.0 Minimum Support Width
• Table 2.1 Saddle Length
• Table 4.0 Recommended Bedding and Backfill
• Table 4.1 Nominal Trench Widths
• Table 6.0 ASTM 2310 Classification
• Table 6.1 Classifying Fiberglass Flanges to ASTM D4024
• Table 6.2 Classifying Fiberglass Pipe Using ASTM D2310 and Specifying Pipe Using ASTM D2996 and D2997

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