SIST EN 14125:2025/oprA1:2026

SIST EN 14125:2025/oprA1:2026 is the Slovenian publication of the CEN draft amendment EN 14125:2025/prA1:2026, published by SIST. It updates the European standard for thermoplastic and flexible metal pipework for underground installation at petrol filling stations, and it is used by manufacturers, test laboratories, specifiers and installers working on underground fuel-station pipework.

What does SIST EN 14125:2025/oprA1:2026 specify?

SIST EN 14125:2025/oprA1:2026 is a draft amendment to EN 14125:2025. The underlying standard specifies requirements for underground pipework systems that transfer liquid fuels and their vapours at petrol filling stations, with minimum performance requirements for fitness for purpose, safety and environmental protection.

The base standard applies to thermoplastic pipework, including some reinforced constructions, and to flexible metal pipework. It excludes fibre reinforced thermosets, commonly called GRP, rigid metals, and pipework used with liquefied petroleum gas.

This amendment document is short and focused. It contains a European foreword and two modification clauses:

What are the key requirements of SIST EN 14125:2025/oprA1:2026?

SIST EN 14125:2025/oprA1:2026 does not introduce a full new test programme; it adjusts how two existing test clauses are worded. In practice, the amendment is about making the test application clearer so that conformity assessment is applied to the right product elements.

1. The crush test wording in 5.4.1 is limited to pipes only

SIST EN 14125:2025/oprA1:2026 adds an explicit “applicable for pipes only” note to the recovery criterion in 5.4.1. The practical effect is that the specified recovery requirement is not treated as a fittings requirement.

For users, this matters when planning type tests and reviewing test reports. A laboratory or manufacturer should read the clause as applying that part of the crush test to pipes, not to fittings.

2. The high temperature crush test wording in 7.2.4.2 is narrowed

SIST EN 14125:2025/oprA1:2026 deletes “and each fitting” from the second paragraph of 7.2.4.2. The practical effect is that the paragraph is no longer written as if it automatically covers every fitting in the same way as the pipes.

This matters for product certification and internal quality checks. It affects which components are included in the high temperature crush test sequence and how the result is documented.

3. The amendment keeps the focus on underground fuel-station pipework

SIST EN 14125:2025/oprA1:2026 still sits within the scope of underground pipework for petrol filling stations. It continues to support the same overall product family as EN 14125:2025, but with clearer test wording.

That means readers should use it together with the base standard, not as a stand-alone product specification.

What terms does SIST EN 14125:2025/oprA1:2026 define?

• Thermoplastic - a pipe material category used in the standard, including versions with some reinforcement.
• Flexible metal pipework - metal pipework designed for underground installation with flexibility in service and installation.
• Delivery pipes - pipes that carry fuel from tanks to dispensers, including positive pressure, vacuum suction and siphon modes.
• Fill pipes - pipes that transfer fuel from road tankers to tanks.
• Vapour recovery - pipework used to handle vapours associated with fuel transfer.
• Secondary containment - pipework intended to provide an additional barrier around the primary pipe.
• Crush test - the test in clause 5.4.1 used to assess how the pipe recovers after being crushed.
• High temperature crush tests - the tests in clause 7.2.4.2 carried out under elevated temperature conditions.

Who uses SIST EN 14125:2025/oprA1:2026?

SIST EN 14125:2025/oprA1:2026 is used by people who design, make, test and approve underground fuel-station pipework. Manufacturers use it to align product testing and technical files with the European standard.

Testing laboratories use it to apply the correct crush-test wording. Certification bodies, inspectors and quality managers use it when checking whether pipes and fittings are covered by the relevant test clause. Buyers, installers and system designers use it when selecting pipework for petrol filling stations.

What changed in SIST EN 14125:2025/oprA1:2026 from the previous edition?

SIST EN 14125:2025/oprA1:2026 modifies EN 14125:2025 in two places:

• In 5.4.1, the crush test recovery criterion is marked as applicable for pipes only.
• In 7.2.4.2, the words “and each fitting” are deleted from the second paragraph.

These changes tighten the wording of the test clauses so that the intended product coverage is clearer.

Which standards are used with SIST EN 14125:2025/oprA1:2026?

• EN 14125:2025 - the base European Standard that this amendment modifies and on which the updated test wording depends.

What does the SIST EN 14125:2025/oprA1:2026 document contain?

SIST EN 14125:2025/oprA1:2026 is a short amendment text rather than a full product standard. It includes a European foreword, then two clauses that amend existing text in the base standard.

Clause 1 gives the change to 5.4.1, “Crush test”. Clause 2 gives the change to 7.2.4.2, “High temperature crush tests”. The document is structured for direct use when updating the base standard, reviewing test procedures, or revising technical documentation.