ISO 8521:2020 - Glass-reinforced thermosetting plastic (GRP) pipes. Test methods for the determination of the initial circumferential tensile wall strength

ISO 8521:2020

Glass-reinforced thermosetting plastic (GRP) pipes. Test methods for the determination of the initial circumferential tensile wall strength

Status : Current   Published : July 2020

Format
PDF

Format
HARDCOPY



This document specifies six test methods for the determination of the initial circumferential tensile wall strength per unit of length of glass-reinforced thermosetting plastics (GRP) pipes.

NOTE

Another commonly used term for “circumferential tensile strength” is “hoop tensile strength” and the two expressions can be used interchangeably.

The burst test (method A) is suitable for all types and sizes of pipes. It is considered the reference method. However, all the methods in this document have equal validity. If correlation of any of the methods B to F can be established by a comparative test programme, then that method can be considered as the reference method.

The split disc test (method B) is not always suitable for pipes with helically wound reinforcing layers.

The strip test (method C), the modified strip test (method D) and the restrained strip test (method E) are suitable for pipes with a nominal size of DN 500 and greater.

The notched plate test (method F) is primarily intended for use with helically wound pipes of nominal size greater than DN 500 with a winding angle other than approximately 90°.

Results from one method are not necessarily equal to the results derived from any of the alternative methods.

If required, the initial circumferential tensile modulus can be determined by method A.




Standard NumberISO 8521:2020
TitleGlass-reinforced thermosetting plastic (GRP) pipes. Test methods for the determination of the initial circumferential tensile wall strength
StatusCurrent
Publication Date09 July 2020
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Draft Superseded ByISO/DIS 8521
DescriptorsPipes, Testing, Glass, Test methods, Plastic pipes
ICS23.040.20
Title in FrenchTubes en plastiques thermodurcissables renforcés de verre (PRV) — Méthodes d'essai pour la détermination de la résistance à la traction circonférentielle initiale de la paroi
CommitteePRI/88/2
PublisherISO
FormatA4
DeliveryYes
Pages26
File Size1.429 MB
Price£95.00


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