Amiantit

QC Inspection of GRP Fittings

 

This inspection program covers the normal fabrication operations of:- 

  •   Mitered elbows
  •   Reducers
  •   Tees-Wyes-Nozzles
  •   Flange pipe studs and flanges.

Checking the properties of these products during fabrication operations is under the responsibility of Q.C. Fitting inspector:-

 

General Inspection

 This table shows the general testing requirements of the above mentioned fittings.  The tests are done to all the fittings. 

Property

Test Method

Before fabrication starts

1.

Pipe inspection prior to fabrication

Q.C. summary visual record and status of on hold pipes.

2.

Pipe spigot outside diameter

PI tape.

3.

Pipe length

Steel tape

Final Inspection

1

Internal lay-up length

Steel tape

2.

External lay-up bond length

Steel tape

3.

Barcol hardness

QW 13

4.

Marking

Visual

5.

Internal grooving at end of layup

Visual

6.

Grinding/cleaning of the layup area

Visual

The following tables show the additional testing requirements for each of the fittings.

All the fittings are made from pipes which have been tested according to pipe test methods.  The tests mentioned below are carried out during production of the fittings.  Final inspection of the fittings must also meet the requirements in the visual standards.  Marking of the fittings must follow the standard marking for each fitting to ensure a complete identification of each fitting.

Property

Test Frequency

Test Method

Elbows

1.

Miter length

Each pipe section before layup.

Steel tape

2.

Gap between elbow sections

Each joint before layup

Steel tape

3.

Angle of elbow

Each elbow before lay-up

Angle measuring device.

4.

Total laying length

Each elbow before layup.

Steel tape.

5.

Alignment of layup

2 points, 180 Deg. apart, each joint.

Steel tape/visual.

6.

Visual (inside/ outside)

Each elbow after final repair

Visually

Reducers

1.

Reducer section length

Each section

Steel tape

2.

Gap at joint

Each joint before layup

Steel tape.

3.

Section alignment after assembly

Each joint before layup

Water level/steel tape.

4.

Length of pipe

Each section

Steel tape

5.

Visual (Inside/ outside).

Each reducer after repair

Visually

Tees,Wyes, Nozzles

1.

Length of header

Pipe section before cutting

Steel tape

2.

Length of branch

pipe section after assembly

Steel tape

3.

Position of branch

Header pipe after cutting and assembly

Steel tape.

4.

Angle between header and branch

Each angle before lay-up.

 Angle measuring device

5.

Gap between header and branch

Each header/branch joint.

Steel tape.

6.

Visual inside/outside

Each after final repair

Visually

Property

Test Frequency

Test Method

Flanges

1.

Pipe length

Each pipe section used for flange fabrication

Steel tape

2.

Concentricity of pipe stud in mold

Each pipe after being fixed on mold.

Steel tape

3.

Grinding of pipe exterior at flange end

Each pipe section

 visual

 After Flange lay-up.

4.

Flange outside dia.

Each flange after repair

PI-Tape

5.

Flange thickness

Each flange

Caliper.

6.

Hub reinforcement length

Each flange with dia. >= 350mm.

Steel tape.

7.

Hub reinforcement thickness

Each flange with dia. >= 350mm

PI-Tape

8.

Groove depth and width

Each Groove flange.

Caliper

9.

Visual inspection

 

 

10.

Bolt circle diameter

Each flange

Steel Tape

11.

No. of bolt holes

Each Flange

-

12.

Bolt hole diameter

Each flange

Caliper

13.

Spot face diameter

Each flange

Caliper

14.

Hole spacing

Each flange

Caliper

15.

Flange squareness

Each flange

Level

16.

Gasket groove dia.

Each flange

Steel tape

Amiantit Pipe Systems
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