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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Sulphuric Acid on the Web

Introduction
General
Equipment Suppliers
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Acid Plant Database
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Technical Manual

Introduction
General

Definitions
Instrumentation
Plant Safety
Metallurgial Processes
Metallurgical
Sulphur Burning
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Lead Chamber
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Gas Cleaning
Contact
Strong Acid
Acid Storage
Loading/Unloading

Transportation
Sulphur Systems
Liquid SO2
Boiler Feed Water
Steam Systems

Cooling Water
Effluent Treatment
Utilities
Construction
Maintenance
Inspection
Analytical Procedures
Materials of Construction
Corrosion
Properties
Vendor Data

DKL Engineering, Inc.

Handbook of Sulphuric Acid Manufacturing
Order Form
Preface
Contents
Feedback

Sulphuric Acid Decolourization
Order Form
Preface
Table of Contents

Process Engineering Data Sheets - PEDS
Order Form
Table of Contents

Introduction

Bibliography of Sulphuric Acid Technology
Order Form

Preface
Contents

Sulphuric Acid Plant Specifications
 

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Materials of Construction - FRP - Inspection
September 23, 2001

Introduction Associated Links

Introduction

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Delamination

Separation of layers.

Cause

  • Poor glass saturation.
  • Dirty surface.
  • Glass content too high.
  • Failure to remove air-inhibition coat before adding layer.
frp2.jpg (14371 bytes)

Fisheye

Small globular mass that has not blended into surrounding material.   Particularly evident in transparent or translucent materials.

Cause

  • Dirty surface.
  • Foreign matter falling on resin.
frp3.jpg (26158 bytes)

Dry Spots

Area of reinforcement that was not wetted with resin.  Usually at edge of laminate.  Dry spots usually associated with molding operations.

Cause

  • Not enough resin used.
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Pimple

Small sharp or conical pimple-like elevation on surface.  Pimples are usually resin-rich.

Cause

  • Dipped resin or small bubble.
  • Working on area after resin has cured.
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Pit or Pinhole

Small regular or irregular crater on surface, usually with nearly equal width and depth.

Cause

  • Air bubbles that rise to surface, which cures before smoothing out.
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Resin Pocket

Accumulation of excess resin in a small localized area..

Cause

  • Improper layup.  Glass separates and void fills with resin.
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Scratch

Shallow mark, groove, furrow or channel.

Cause

  • Improper handling or storage.
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Worm Holes

Elongated void in surface or covered by thin film of cured resin

Cause

  • Usually found in small-diameter pipe where cure is from the outside and progresses towards the mandrel.
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Wrinkle

Crease or wrinkle-like surface imperfection in one or more plies of molded-in reinforcement.

Cause

  • Improper layup.
  • Too rapid cure.
  • Use of old resin
  • Fold in release film on the mold.