ISO 25780-2011 PDF

Full title and description

St ISO 25780-2011 — Plastics piping systems for pressure and non-pressure water supply, irrigation, drainage or sewerage — Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin — Pipes with flexible joints intended to be installed using jacking techniques. This International Standard specifies characteristics, test parameters and joint performance requirements for GRP‑UP pipes and flexible joints intended for trenchless pipe‑jacking installation.

Abstract

ISO 25780:2011 sets out material and system properties, dimensional and marking requirements, and the type‑test methods and performance criteria for GRP (glass‑reinforced thermosetting plastics) pipes based on unsaturated polyester (UP) resin that use flexible joints and are intended to be installed by jacking techniques. It covers pipes (with or without aggregates/fillers) and joints for water supply, irrigation, drainage and sewerage applications (pressure and non‑pressure) and includes methods for determining longitudinal compressive properties and procedures to calculate permissible jacking force.

General information

• Status: Published (Edition 1) — reviewed and confirmed in 2020; scheduled for revision.
• Publication date: May 2011.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 93.030 (External sewage systems); 23.040.20 (Plastics pipes); 91.140.60 (Water supply systems); 91.140.80 (Drainage systems).
• Edition / version: Edition 1 (2011).
• Number of pages: 51.

Scope

Applies to GRP piping systems based on unsaturated polyester (UP) resin with flexible joints that are intended to be installed using jacking techniques. The standard covers pipes and joints in the nominal size range DN100 to DN4000 for conveyance of water or sewage at temperatures up to 50 °C (with or without pressure). It specifies material/system characteristics, joint design objectives, type‑test performance requirements (including leaktightness and structural proof of joints), and test parameters and procedures relevant to jacked installation.

Key topics and requirements

• Definition of GRP‑UP pipe and joint types suitable for jacking (materials, construction variants, liners/ fillers).
• Dimensional, marking and manufacturing tolerances for pipes intended for jacking installation.
• Type‑test methods and performance criteria for flexible joints: leaktightness, angular deflection, axial movement, compression and internal pressure behaviour.
• Design and test requirements expressed as functions of declared nominal pressure rating and required joint deflection capability.
• Limits of application: nominal sizes DN100–DN4000 and operating temperatures up to 50 °C.
• Methods for determining longitudinal compressive properties (prism and spool test pieces) and a procedure to calculate permissible jacking force for a pipe string.
• Guidance to manufacturers, testing laboratories and specifiers on type testing, verification and quality control for jacked GRP systems.

Typical use and users

Used by GRP pipe manufacturers (product specification and quality control), design engineers and specifiers for water, sewerage and drainage projects requiring trenchless installation, trenchless contractors and site engineers planning jacking works, testing laboratories performing type tests on pipes and joints, and utilities/owners evaluating materials and systems for buried jacked pipelines.

Related standards

Commonly referenced and complementary standards include ISO 10639 (GRP-UP systems for water supply), ISO 10466 (ring deflection test methods), ISO 10468 (ring creep and creep stiffness tests), ISO 8639 (test methods for leaktightness and structural proof of flexible joints), ISO 10467 (GRP‑UP systems for drainage and sewerage), and the ISO 14692 series (GRP piping for petroleum and natural gas — design, qualification and manufacture). National and industry standards and codes covering pipe‑jacking practice (for example EN and ASCE documents on pipe jacking and jacking‑force design) are also relevant when specifying installation procedures and acceptance criteria.

Keywords

ISO 25780, GRP, GFRP, UP resin, glass‑reinforced thermosetting plastics, jacking, pipe jacking, trenchless installation, flexible joints, DN100–DN4000, water supply, drainage, sewerage, joint leaktightness, type testing, permissible jacking force.

FAQ

Q: What is this standard?

A: ISO 25780:2011 is an International Standard that defines materials, performance requirements and test methods for GRP (glass‑reinforced thermosetting plastics) piping systems based on unsaturated polyester (UP) resin that use flexible joints and are intended to be installed by jacking techniques.

Q: What does it cover?

A: It covers pipe and joint characteristics, dimensional and marking requirements, type‑test procedures and performance criteria (including joint leaktightness and structural proof), permissible jacking force calculations and test methods for pipes/joints sized DN100 to DN4000 for water, irrigation, drainage and sewerage at temperatures up to 50 °C.

Q: Who typically uses it?

A: Manufacturers, product designers, testing laboratories, trenchless contractors, civil/utility engineers and asset owners involved in selection, manufacture, testing and installation of GRP pipes for jacked/trenchless projects.

Q: Is it current or superseded?

A: The original edition was published in May 2011 and was reviewed/confirmed in 2020. It has been identified for revision; a draft revision (ISO/PRF 25780) has been developed to replace the 2011 edition. Check the standards publisher or national standards body for the latest publication status before procurement to confirm whether a revised edition has been released.

Q: Is it part of a series?

A: Yes — ISO 25780 sits alongside other GRP piping standards (for example ISO 10639, ISO 10466, ISO 10468, ISO 10467 and ISO 8639) that together address materials, test methods, hydraulic and structural design and joint performance for GRP piping systems. It is also related conceptually to the ISO 14692 series for GRP piping in the petroleum sector.

Q: What are the key keywords?

A: GRP, UP resin, glass‑reinforced thermosetting plastics, flexible joints, jacking, pipe jacking, trenchless, DN100–DN4000, leaktightness, permissible jacking force, type testing.