What is BS EN 1254‑4 standard about?
BS EN 12544 is the fourth part of the EN 1254 multi-series. BS EN 1254‑4 specifies product characteristics, assessment methods, compliance criteria of the test results and a designation system for threaded fittings. These threaded ends exist with metallic and with non-metallic sealing elements to join with tubes, pipes, fittings or valves. The threaded ends have a size range from 3.175 mm (1/8”) to 101.6 mm (4”). The threaded fittings are designed for a service lifetime up to 50 years.
Under BS EN 1254-4, threaded fittings may also have flanged end connections according to EN 1092‑3. Threaded fittings may also have a plated or other decorative surface coating.
Fittings can be produced by machining, metal forming, casting, or fabrication.
Products covered by BS EN 1254‑4 are intended to be used in:
- Liquid applications
- Gas applications
Note: Products complying with this document may be used for several fluids including the transport of water intended for human consumption if they comply with the relevant national, regional or local regulatory provisions applicable in the place of use.
Who is BS EN 1254‑4 standard for?
BS EN 1254‑4 on threaded fittings is beneficial for:
- Manufacturer of threaded fittings
- Suppliers of parts like screws/nuts, pipes and tubes
- Suppliers of copper and copper alloys
- Installers
- Quality assessment personnel
- Mechanical engineers
- Trained and skilled technicians
Why should you use BS EN 1254‑4 standard?
The plumbing industry widely uses threaded fittings in non-critical applications, especially in situations where welding is not required.
BS EN 1254‑4 provides information on product characteristics like internal pressure, tightness, the wall thickness at the threaded portions of fittings, testing, assessment and sampling methods, marking, labelling and packaging.
Test methods and test results provided in BS EN 1254‑4 helps the user detect the defects at joints and improve the quality of the fitting joint.
BS EN 1254-4 also defines responsibility, authority and the relationship between personnel that manages, performs or verifies work, thereby affecting product quality.
As the buyer of BS EN 1254‑4 you can be ensured of durable, corrosion and heat-resistant fittings that minimize the risk of leakage and contamination. As a result, BS EN 1254-4 takes into account safety and protection of the product end-user while prolonging the service-life of the compression fitting. Moreover, guidance regarding the right elastomeric sealing, installation and fitting of nut/screws is essential in the success of compression fittings in any given application or functionality. Overall, with BS EN 1254-4, you will be able to scale your business with these globally accepted guidelines.
What’s changed since the last update?
BS EN 1254‑4:2021 supersedes BS EN 1254‑4:1998, which is withdrawn.
The main changes to EN 1254‑4:1998 are:
- Focus on threaded fittings instead of threaded ends
- Separation of test methods and the geometrical description of the standardized threads into part 20
