QC System

GRP Quality Control System

In-house mechanical properties tests:
1. Laminate Flexure Strength
2. Laminate Compressive Strength
3. Laminate Lap Shear Strength
4. Pipe Stiffness
5. Percent resin-extension-to-failure
6. Hoop Tensile Strength Test (pipes)
7. Axial Tensile Strength Test (Pipes)
8. Hydrostatic Leak Test (Pipes & Tanks)
9. Dimensional & Barcol Hardness Check
10. Loss On Ignition Test
11. Visual ExaminationIncoming Materials Tests:
1. Consolidated Liquid Resin Test
2. Homogeneity Test of Roving, CSM,
WR, SM
3. Size Content in Spray Roving,
CSM, WR, SM
4. Humidity Test of Roving, CSM,
WR, SM

Flexure test

Bond strength test

Laminate flexure strength test to ASTM D790 standard

Laminate check

Description of Test	Tolerance
Barcol hardness check	± 10% of agreed value
Specific gravity check	± 10% of agreed value
Percent glass check	± 10% of agreed value
Percent resin check	± 10% of agreed value
Percent void check	± 10% of agreed value
Thickness check	± 10% of agreed value

Resin Check

Description of Test	Tolerance
Color check	± 10% of agreed value
Acid Value check	± 10% of agreed value
Viscosity check	± 10% of agreed value

Acid value check

Viscosity check

Physical Check For GRP Tanks & Vessels

Description of Test

Passing Requirement

rWater-load Test

Method:

1.Tank is placed on saddles at distan
-ce between support shall not be less
than one(1.0) meter.
2.A marker is located at mid-length of
tank. The initial value is marked as Zero (0).
3.Tank is then filled with water to full
capacity. As the water on the tank ri
-ses, the marker moves. record the -
maximum movement as deflection in -
millimeters (mm)

Tank shall not break or presence of crack on any location of the walls or caps is a sign of failure.

Deflection shall not be more than:
30 mm for diameter less or equal to 1.6m; 75 mm for diameter greater to 1.6 and diameter less or equal to 3.4m

Dimensional Check

for Tank Inside Diameter
for Tank Cylinder Length
for Tank Fittings Orientations
for Tank Ribs Distances
for FRP Flange Bolt Holes
for Other Tank Accessories

±3% of agreed value
±10% of agreed value
±5% of agreed value
±5% of agreed value
±3% of agreed value
±10% of agreed value

Leak Test

Method:After the 24-hour test above pressurize the tank to the,

following:
(a) for tank diameter<=2.4m use test pressure=5.0 psig (b)for tank Diamete r>2.4 and tank diameter<=3.4m

use

Tank shall not leak.

Physical Check For GRP Pipes

Components	Characteristic Checked	Frequency	Acceptance Standard
Testing the Rubber Ring	Visual Check	Each Lot	Must be free from any visual defects.
In-process Control	1. Laminate cure check 2. Pipe thickness check	Every 15 mins.	Customer’s Acceptance Std. Section, F.2.5
Routine Quality Control	1. Visual Control 2. Dimensional Control 3. Curing (barcol hardness)4. Stiffness 5. Longitudinal Tensile Strength 6. Loss On Ignition 7.HoopTensile Strength 8. Hydrostatic pressure Test	1 in 10 1 in 10 1 in 10 1 in 50 1 in 50 1 in 50 1 in 50 100%	ASTM D3567 & BS 5480 ASTM D2583 BS 5480 & ASTM D2412 BS 5480 ASTM D2580 ASTM D2290 BS5480

Laminate barcol hardness test using, Barcol Impresser

Loss On Ignition test

Axial & hoop tensile strength test.

Misaligned Joint test.

Stiffness test

Beam-strength test

Long-Term Type Test – at least 10,000 hours

This is a qualification test for the type of materials used and method of production. Unless this test confirms the performance of the specimen-pipe, pipe should not be used for sewer application.

Strain-corrosion test

This is another qualification test for pipes used in pressure lines. This is called HDB test per ASTM D 2992, Procedure B. Like in strain-corrosion test, it qualifies the method of production, and raw materials. The resulting data can be used to predict the service life of the pipe.

HDB test

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QC System

GRP

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