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Product Information Glass Reinforced Plastic Pipe - More Product Information (Pressure & Loading Restrictions, Joints, Product Qualification)

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Product Information Glass Reinforced Plastic Pipe
More Product Information (Pressure & Loading Restrictions, Joints, Product Qualification)
More Product Information (Quality Control, Physical/Mechanical Properties)
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  • Pressure and Loading Restrictions

  • Joints

  • Product Qualification

A. PRESSURE RESTRICTIONS

Pipe manufactured per this specification will have the following pressure capabilities regardless of pipe stiffness.

Pressure Class (KPa)
PN1
PN3
PN6
PN10
PN12
PN16
Maximum operating pressure (KPa)
100
300
600
1,000
1,200
1,600
Maximum surge pressure (KPa)
140
420
840
1,400
1,680
2,240
Maximum field test pressure (KPa)
150
450
900
1,500
1,800
2,400
Maximum factory test pressure (KPa)
200
600
1,200
2,000
2,400
3,200

B. STIFFNESS CLASSES AND ALLOWABLE VACUUM
GRP pipes shall have the following characteristics regardless of pressure class.
Stiffness Class (N/M2)
SN 2500
SN 5000
SN 10000
Minimum Specific Tangential Initial
2500
5000
10000
Stiffness STIS = EI/D3 (N/M2)

Maximum allowable vacuum level in KPa at cover with hard soil & water table at grade and pipe install in:

Installation Type*

(I) Full compacted gravel @ maximum cover depth
-100
-100
-100
(II) Full Sand compacted to 90% standard proctor density (@ depth show in m)
-60 (4m)
-100 (6m)
-100

* Maximum vacuum level varies with the type of installation and burial depth.

C. BURIAL DEPTH

Minimum Cover Depth ** for :

- AASHTO H-20 Loading (m) 1.0

- BS 153 HA Loading (m) 1.5

- Cooper E 80 Railroad (m) 3.0

Maximum Cover Depth *** installed in :

SN 2500
SN 5000
SN 10000
- Fully compacted gravel (m)
14
16
18
- Fully compacted sand to 90% Standard proctor density
8
10
15

** Minimum cover restrictions may be reduced with special installation such as concrete encaseme concrete cover slabs casting, or other provisions to carry the surface load.

**** Maximum allowable cover depth varies with the type of installation and native soil conditions.

D. MAXIMUM ALLOWABLE DEFLECTION

Regardless of pipe stiffness or pressure class, the following restrictions apply:

Native Soil Blow Count
>30
16 to 30
8to 15
4 to 7
1 to 3
Maximum allowable initial vertical deflection (%)
4
3 1/2
3
2 1/2
2
Maximum allowable long-term vertical deflection (%)
5
5
5
5
5

A. Mechanical Coupler (MC)

Mechanically coupled joints typically seal on the OD of plain end pipes through the use of gaskets that are loaded mechanically (compressed) to effect the seal. There is no ability to accommodate longitudinal forces in this design. Mechanical coupler are mostly non-thrust resistant.

B. Flanged Joint (FJ)

To enable connection with many types of pipes and to allow for easy assembling and disassembling of process lines, specifications. Special requirements can be met upon request.

Glass Fiber reinforces epoxy flanges are always flat faced and in view of this, matching flanges should also be flat faced. The flanged joint is completed by using a gasket.

Flanged Joint

C. Laminated Joint (LJ)

Generally these joints will only be used for diameters over 400 mm. the joints is consisting of Layers of fiberglass mat and/or tapes impregnated with the preparation of this rigid requires good craftsmanship.

Laminated Joints

D. Adhesive Bonded Joint (CJ)

The advanced strong adhesive bonded joint is a rigid type of joining. The adhesive is a two component epoxy resin system, packed in separate containers. The joint consists of a slightly conical socket end and a cylindrical spigot end.

Adhesive Bonded Joint

ALLOWABLE JOINT ANGULAR DEFLECTION

Allowable Joint Angular Deflection

The maximum angular deflection must not exceed the amount given in the following table as per BS 5480.

Nominal Pipe Diameter (mm)
Nominal Angular Deflection (a) (degree)
Nominal Offset (mm)
Section Lengths
Nominal Radius of Curvature (m)
Section Lengths
3m
6m
12m
3m
6m
12m
0080 to 0150
4.0
210
420
840
43
86
172
0200 to 0300
3.5
183
367
733
49
98
196
0350 to 0500
3.0
157
314
629
57
115
229
0600 to 0900
2.0
105
210
419
86
172
344
1000 to 1200
1.5
79
157
314
114
229
458
1300 to 1800
1.0
52
105
210
172
334
687
1900 to 2600
0.5
26
52
105
344
687
1375

ASTM D 2992 Standard practice for obtaining hydrostatic or pressure design basis for Glass Fiber Reinforced Thermosetting Resin Pipe and Fittings. (Hydrostatic Design Basic (HDB).
ASTM D 3681 Chemical resistance of Glass Fiber Reinforced Thermosetting Resin Pipe in deflected condition (Strain corrosion performance).
ASTM D 4161 Standard specification for Glass Fiber Reinforced Thermosetting Resin Pipe joint using flexible elastomeric seals.
BS 5480 Appendix L British standard specification for Glass Reinforced Plastic (GRP) pipes, joints and fittings for use for water supply or sewerage-method for determination of long term specific ring stiffnss and creep factor under ring deflection.