Iranian Classification Society Rules

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Section 16 Plastic Pipes


1601. Application

The requirements of this Section apply to tests and inspection for the approval of plastic pipes in

accordance with the requirements in Pt 5, Ch

Guidances.

6, 102. 5 of the Rules and in Annex 5-6, Pt 5 of the


1602. Data to be submitted

The following reference data are to be submitted to the Society in addition to those specified in

102.

(1) General Information

(a) Dimensions of plastic pipe and pipe fittings

(b) Maximum internal and external working pressure

(c) Working temperature range

(d) Intended services and installation locations

(e) The level of fire endurance

(f) Electrically conductive

(g) Intended fluids

(h) Limits on flow rates

(i) Serviceable life

(j) Installation instructions(Precautions at work site, repair procedures and criteria for determining

whether repairs are necessary or not)

(k) Packing, handling and marking methods

(l) Storage means of products

(2) Drawings and supporting documentation

(a) Certificates and reports for relevant tests previously carried out.

(b) Details of relevant standards.

(c) All relevant design drawings, catalogues, data sheets, calculations and functional descriptions.

(d) Fully detailed sectional assembly drawings showing pipe, fittings and pipe connections.

(3) Materials

(a)

The resin type.

(b) Catalyst and accelerator types, and concentration employed in the case of reinforced poly- ester resin pipes or hardeners where epoxide resins are employed.

(c)


(d)

A statement of all reinforcements employed where the reference number does not identify

the mass per unit area or the tex number of a roving used in a filament winding process,

these are to be detailed.

Full information regarding the type of gel-coat or thermoplastic liner employed during con-

struction, as appropriate.

(e) Cure/post-cure conditions. The

inforcement ratio.

(f) Winding angle and orientation.

(4) Physical properties

cure and post cure temperatures and times employ resin/re-

Strength of pipes against bending, twisting and strength of bonded section against abrasions by

sand, sludge, etc. Data on types

of joint, working procedures. In the data, those relating to

bending strength and fatigue strength at standard bends and joints are to be included.


1603. Type tests

The requirements in Table 3.16.1 are, in principle, to be considered as the criteria for the type tests of plastic pipes. For application of the tables, see below:

(1) For those asterisked in the column of criteria, test results shall satisfactory to the manufacturer's reference.

(2) Flame spread, fire endurance, electric conductivity and durability against chemicals test in

Table 3.16.1 are to be carried out, where they are required in the Guidances.

(3) For those with maximum working temperature exceeding 80 °C, boiled in Table 3.16.1 may additionally be required.

Annex 5-6, Pt 5 of the


water absorption rate test

(4) Where testing method other than those given in Table 3.16.1 is employed, it may be judged as

deemed appropriate by the Society in consideration of the equivalency.


106 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015

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Table 3.16.1 Testing methods and Criteria of Plastic pipes


Testing items

Testing method

Criteria


Strength against internal pressure of pipe

Short Term : AST M D 1599


*

Long Term(>100,000 h) :

A S T M D 1598, D 2992

Strength against external pressure of pipe


AS T M D 2924


*(collapsed pressure not less than 3bar.)

Strength against impact force

KS M ISO9653, ASTM D2444

*(After test, test sample should be pass the pressure test at 2.5 times of design pressure for 1 hour.)

Tensile strength

ASTM D2105, D2290

*

External loading characteristics


ASTM D2412


*

Resistance to cyclic internal pressure (Expansion Couplings)_


IS O 15306


*

External Pressure Resistance

(Expansion Couplings)_


A S T M D 2924


*

Heat dependence of material


KS M ISO75-2 Method A

Minimum heat distortion temperature ≥80℃

Electric conductivity

ASTM D257

Surface electrical resistance not more than 0.1 MΩ/m


Flame spread (Fire durability)


IMO Res. A753(18)

Appendix 3

To have low surface flame spread characteristics not exceeding average values listed in the FTP code, Annex 1, Pt 5


Fire endurance


IMO Res. A753(18),

Appendix 1, 2

L1 : Fire endurance test (IMO Re s. A 753(18) Appendix 1) in dry conditions, 60 min.

L2 : Fire endurance test (IM O Res. A 753(18)

Appendix 1) in dry conditions, 30 min.

L3 : Fire endurance test (IM O Res. A 753(18) Appendix 2) in wet conditions, 30 min.


Aging

KS M ISO9142 or manu- facturer's Standards(1)

*(The characteristics of the product will not be de- graded depending on the environmental conditions.)


Fatigue

ISO15306 or Manufacturer's Standards(1)

*(Product shall not be affected by the fatigue frac- ture at average service pressure)


Water absorption rate


ISO8361(1)

*(The product shall not be degraded by absorbing the intended fluids)


Erosion

Manufacturer's Standards or Service Records(1)

*(The functions of product will not be affected by erosion until 7m/s of design flow rate)

Durability against chemicals


ASTM C581(1)

*(The material properties will not be affected by the intended fluids)

Notes

1. Recognized laboratory's test reports, manufacturer's test reports or service records may be accepted instead of type test provided that the Society considers appropriate.


(5) Judgements for acceptance are to be made in accordance with the following procedures and cri- teria:

(A) Rate of water absorption is to be judged on average values of three test specimens.

(B) For flame spread, judgement is to be made on each of the three test specimens.

Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 107

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(C) For heat dependence of material, the acceptance criteria are to be satisfied by the mean val- ue of the three test specimens or at least that of two test specimens.

(D) For other test items, tests are to be conducted on at least three test specimens test result of each test specimen is to satisfy the acceptance criterion.

where the


1604. Marking

The plastic pipes approved by the Society are to be marked with the following.

(1) Type of product or trade name

(2) Mark to prove that the product is approved by the Society.

(3) Nominal pressure, [G] for those with low flame spread characteristics, [D] for those with elec- tric conductivity, material of which pipe or fitting is made

(4) Fire endurance level for those with fire endurance


108 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015

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