Grey 27mm (3/4″) ABS Aspirating Pipe 90 Degree Bend

FAQ

What is the purpose of a 90 degree sweeping bend in aspirating pipe networks?

The 90 degree sweeping bend allows installers to change the direction of aspirating pipe networks to route around obstacles such as structural elements, services and equipment. The sweeping bend design maintains optimal airflow characteristics by minimising turbulence and air loss through its gradual radius, which is critical for maintaining system performance and sensitivity in aspirating smoke detection applications.

Why choose grey ABS instead of red for aspirating pipe?

Grey ABS aspirating pipe and fittings are chosen for aesthetic reasons in locations where the standard red colour may not be visually appropriate. The neutral grey finish provides a discreet option that is ideal for commercial offices, retail environments, museums, galleries, high-end corporate spaces and other prestigious buildings where red pipework may be visually intrusive. Grey provides the same technical performance and fire safety compliance as red pipework whilst offering a more subtle appearance.

Which aspirating smoke detection systems is the ABSCUP0250 compatible with?

The ABSCUP0250 is compatible with all major brands of low-pressure aspirating smoke detection systems including VESDA, FAAST, ICAM and other leading ASD manufacturers. The fitting is approved to EN 54-20 standards required for these systems and is specifically designed for 27mm (3/4″) aspirating pipe networks.

What is the difference between 25mm and 27mm aspirating pipe?

The 27mm (3/4″) pipe has a larger internal diameter compared to 25mm pipe, allowing for higher airflow capacity and longer pipe runs in aspirating smoke detection systems. The 27mm size is an imperial standard (3/4″), whilst 25mm is metric. The choice between sizes depends on the system design, area coverage requirements and pipe network calculations provided by the ASD system manufacturer or certified distributor.

What temperature range can the bend operate in?

The ABS material performs reliably across temperatures from -40°C to +80°C, with working temperatures between -20°C to +40°C recommended for optimal performance. This makes it suitable for demanding environments including cold stores, freezer rooms, industrial facilities, data centres and outdoor applications. The material maintains its impact strength and toughness throughout this entire temperature range.

How is the bend installed?

Installation involves cutting pipe ends squarely using approved plastic pipe cutters, ensuring cutters are sharp, removing all burrs, abrading both the pipe ends and the fitting interior, cleaning surfaces, then applying the correct ABS solvent cement (such as Plusbond 3019) before pushing the components together. The joint must be held steady whilst the solvent sets and allowed to cure fully before testing. Pipe clips should be installed every 800mm along the length of pipe at ambient temperatures, reduced to 600mm at temperatures above 30°C.

Can grey ABS pipe be mixed with red ABS pipe in the same system?

Yes, grey and red ABS aspirating pipes and fittings are technically identical and can be mixed within the same system using standard ABS solvent cement welding. However, for aesthetic consistency and system identification purposes, it’s generally recommended to use a single colour throughout an installation zone. Mixing colours may be appropriate where pipework transitions between different areas with different aesthetic requirements.

What standards does the ABSCUP0250 comply with?

The bend is manufactured under a BS EN ISO 9001 quality control system and is tested and approved to EN 54-20 (fire detection and fire alarm systems – aspirating smoke detectors) and EN 61386-1 (conduit systems for cable management) standards, ensuring full compliance with UK and European fire safety regulations.

What are the chemical resistance properties?

The ABS material provides excellent chemical resistance to a wide range of acids, alkalis and aggressive chemicals. The homogenous material construction ensures consistent chemical resistance throughout the fitting, making it suitable for installation in industrial environments, chemical processing facilities, laboratories and other areas where corrosive substances may be present.

Can the bend be installed outdoors or in direct sunlight?

Whilst the ABS material is suitable for outdoor applications and maintains its properties across the full temperature range, it should not be installed in direct continuous sunlight. Prolonged UV exposure can affect the material properties over time. For outdoor installations, the pipework should be protected from direct sunlight or alternative UV-resistant materials should be considered.