Being one of the top HDPE-lined fittings manufacturers in Midland, UK, we have expertise in providing cutting-edge anti-corrosion solutions to the oil & gas, mining, water treatment, and chemical processing industries. By applying our HDPE lining technology, we reinforce steel fittings to become more chemical-resistant and durable, resisting tough operating conditions. Through proprietary methods such as high-pressure insertion or heat forming, we form a tight, leak-proof union of the HDPE liner and the steel body. In various diameters and wall thicknesses, our fittings are international standards and pressure-rated up to 100 bar. Our HDPE-lined fittings have lower maintenance, longer lifespan, and reliable flow in harsh environments and for long-term performance.
HDPE lined fittings are employed where corrosion resistance, chemical compatibility, and longevity are paramount. Highly applied within oil & gas, mining, water treatment and chemical processing processes, they create an internal barrier to aggressive fluids, slurries, or corrosive gases. Ideal for applications subject to abrasive or highly reactive materials, they extend the life of metal components while maintaining structural integrity. They are particularly valuable for high-pressure applications, withstanding up to 100 bar, and in operations where maintenance is low and flow is constant. HDPE-lined fittings offer an economic option for problematic pipeline situations, offering leak-tight performance and lower downtime in demanding industrial processes.
| O.D | PN 2.5 | PN 4 | PN 6 | PN 8 | PN 10 | PN 12.5 | PN 16 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | |||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) | ||
| 20 | – | – | – | – | – | – | – | – | 2.3 | 2.8 | 2.7 | 3.2 | 3.4 | 4.0 | ||
| 25 | – | – | – | – | – | – | 2.3 | 2.8 | 2.8 | 3.3 | 3.4 | 4.0 | 4.2 | 4.9 | ||
| 32 | – | – | – | – | 2.3 | 2.7 | 3.0 | 3.5 | 3.6 | 4.2 | 4.4 | 5.0 | 5.4 | 6.2 | ||
| 40 | – | – | 2.0 | 2.4 | 2.8 | 3.3 | 3.7 | 4.3 | 4.5 | 5.1 | 5.5 | 6.2 | 6.7 | 7.6 | ||
| 50 | – | – | 2.4 | 2.9 | 3.5 | 4.1 | 4.6 | 5.3 | 5.6 | 6.4 | 6.8 | 7.7 | 8.4 | 9.5 | ||
| 63 | 2.0 | 2.4 | 3.0 | 3.5 | 4.4 | 5.1 | 5.8 | 6.6 | 7.0 | 7.9 | 8.6 | 9.6 | 10.5 | 11.8 | ||
| 75 | 2.3 | 2.7 | 3.6 | 4.2 | 5.3 | 6.0 | 6.9 | 7.8 | 8.4 | 9.4 | 10.2 | 11.4 | 12.5 | 14.0 | ||
| 90 | 2.8 | 3.2 | 4.3 | 5.0 | 6.3 | 7.2 | 8.2 | 9.3 | 10.0 | 11.2 | 12.2 | 13.6 | 15.0 | 16.7 | ||
| 110 | 3.4 | 3.9 | 5.3 | 6.0 | 7.7 | 8.7 | 10.0 | 11.2 | 12.3 | 13.7 | 14.9 | 16.6 | 18.4 | 20.5 | ||
| 125 | 3.8 | 4.4 | 6.0 | 6.8 | 8.8 | 9.4 | 11.4 | 12.8 | 13.9 | 15.5 | 16.9 | 18.8 | 20.9 | 23.2 | ||
| 140 | 4.3 | 4.9 | 6.7 | 7.6 | 9.8 | 11.0 | 12.8 | 14.3 | 15.6 | 17.4 | 19.0 | 21.1 | 23.4 | 26.0 | ||
| 160 | 4.9 | 5.6 | 7.7 | 8.6 | 11.2 | 12.5 | 14.6 | 16.3 | 17.8 | 19.8 | 21.7 | 24.0 | 26.7 | 29.6 | ||
| 180 | 5.5 | 6.2 | 8.6 | 9.7 | 12.6 | 14.1 | 16.4 | 18.3 | 20.0 | 22.2 | 24.4 | 27.0 | 30.0 | 33.2 | ||
| 200 | 6.1 | 6.9 | 9.6 | 10.7 | 14.0 | 15.6 | 18.2 | 20.3 | 22.3 | 24.7 | 27.1 | 30.0 | 33.4 | 37.0 | ||
| 225 | 6.9 | 7.7 | 10.8 | 12.0 | 15.7 | 17.5 | 20.5 | 22.8 | 25.0 | 27.7 | 30.5 | 33.7 | 37.5 | 41.0 | ||
| 250 | 7.6 | 8.6 | 11.9 | 13.3 | 17.5 | 19.4 | 22.8 | 25.3 | 27.8 | 30.8 | 33.8 | 37.4 | 41.7 | 46.1 | ||
| 280 | 8.5 | 9.6 | 13.4 | 14.9 | 19.6 | 21.7 | 25.5 | 28.3 | 31.2 | 34.5 | 37.9 | 41.9 | 46.7 | 51.6 | ||
| 315 | 9.6 | 10.7 | 15.0 | 16.7 | 22.0 | 24.4 | 28.7 | 31.8 | 35.0 | 38.7 | 42.6 | 47.1 | 52.5 | 58.0 | ||
| 355 | 10.8 | 12.1 | 16.9 | 18.8 | 24.8 | 27.5 | 32.3 | 35.8 | 39.5 | 43.7 | 48.0 | 53.0 | 59.2 | 65.4 | ||
| 400 | 12.2 | 14.2 | 19.1 | 22.1 | 28.0 | 32.3 | 36.4 | 42.1 | 44.5 | 51.4 | 54.1 | 62.4 | – | – | ||
| 450 | 13.7 | 15.9 | 21.5 | 25.0 | 31.4 | 36.3 | 41.0 | 47.4 | 50.0 | 57.7 | – | – | – | – | ||
| 500 | 15.2 | 17.7 | 23.9 | 27.6 | 34.5 | 40.4 | 45.5 | 52.6 | 55.6 | 64.1 | – | – | – | – | ||
| 560 | 17.0 | 19.8 | 26.7 | 30.9 | 39.1 | 45.2 | 51.0 | 58.9 | – | – | – | – | – | – | ||
| 630 | 19.1 | 22.2 | 30.0 | 34.7 | 44.0 | 50.8 | 57.3 | 66.1 | – | – | – | – | – | – | ||
| 710 | 21.6 | 25.0 | 33.9 | 39.1 | 49.6 | 57.2 | – | – | – | – | – | – | – | – | ||
| 800 | 24.3 | 28.1 | 38.1 | 44.1 | 55.9 | 64.4 | – | – | – | – | – | – | – | – | ||
| 900 | 27.3 | 31.6 | 42.9 | 49.9 | – | – | – | – | – | – | – | – | – | – | ||
| 1000 | 30.3 | 35.1 | 47.7 | 55.0 | – | – | – | – | – | – | – | – | – | – | ||
Grayson PTFE Lined Pipe is a leading supplier of HDPE Lined Fittings in Midland, UK, offering high-quality, corrosion-resistant solutions ideal for chemical, pharmaceutical, and industrial applications.
| O.D | PN 2.5 | PN 4 | PN 6 | PN 8 | PN 10 | PN 12.5 | PN 16 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) |
| 20 | – | – | – | – | – | – | – | – | – | – | 2.3 | 2.7 | 2.8 | 3.3 |
| 25 | – | – | – | – | – | – | – | – | 2.3 | 2.7 | 2.8 | 3.3 | 3.5 | 4.0 |
| 32 | – | – | – | – | – | – | 2.4 | 2.9 | 3.0 | 3.4 | 3.6 | 4.2 | 4.5 | 5.1 |
| 40 | – | – | – | – | 2.3 | 2.7 | 3.0 | 3.5 | 3.7 | 4.3 | 4.5 | 5.1 | 5.6 | 6.3 |
| 50 | – | – | 2.3 | 2.8 | 2.9 | 3.4 | 3.8 | 4.4 | 4.6 | 5.3 | 5.6 | 6.4 | 6.9 | 7.8 |
| 63 | – | – | 2.5 | 3.0 | 3.6 | 4.2 | 4.7 | 5.4 | 5.8 | 6.6 | 7.0 | 7.9 | 8.7 | 9.8 |
| 75 | – | – | 2.9 | 3.4 | 4.3 | 4.9 | 5.6 | 6.4 | 6.9 | 7.8 | 8.4 | 9.4 | 10.4 | 11.6 |
| 90 | 2.3 | 2.8 | 3.5 | 4.1 | 5.1 | 5.8 | 6.7 | 7.6 | 8.2 | 9.3 | 10.0 | 11.2 | 12.5 | 16.9 |
| 110 | 2.7 | 3.2 | 4.3 | 5.0 | 6.3 | 7.1 | 8.2 | 9.3 | 10.0 | 11.2 | 12.3 | 13.8 | 15.2 | 16.9 |
| 125 | 3.1 | 3.7 | 4.9 | 5.6 | 7.1 | 8.0 | 9.3 | 10.5 | 11.4 | 12.8 | 13.9 | 15.5 | 17.3 | 19.2 |
| 140 | 3.5 | 4.1 | 5.4 | 6.2 | 8.0 | 9.0 | 10.4 | 11.7 | 12.8 | 14.3 | 15.6 | 17.4 | 19.4 | 21.5 |
| 160 | 4.0 | 4.6 | 6.2 | 7.1 | 9.1 | 10.2 | 11.9 | 13.3 | 14.6 | 16.3 | 17.8 | 19.8 | 22.1 | 24.5 |
| 180 | 4.4 | 5.1 | 7.0 | 7.9 | 10.2 | 11.5 | 13.4 | 15.0 | 16.4 | 18.3 | 20.0 | 22.2 | 24.9 | 27.6 |
| 200 | 4.9 | 5.6 | 7.7 | 8.7 | 11.4 | 12.7 | 14.9 | 16.6 | 18.2 | 20.3 | 22.3 | 24.7 | 27.6 | 30.6 |
| 225 | 5.5 | 6.3 | 8.7 | 9.8 | 12.8 | 14.3 | 16.7 | 18.6 | 20.5 | 22.8 | 25.0 | 27.7 | 31.1 | 34.4 |
| 250 | 6.1 | 7.0 | 9.7 | 10.9 | 14.2 | 15.8 | 18.6 | 20.7 | 22.8 | 25.3 | 27.8 | 30.8 | 34.5 | 38.2 |
| 280 | 6.9 | 7.8 | 10.8 | 12.1 | 15.9 | 17.7 | 20.8 | 23.1 | 25.5 | 28.3 | 31.2 | 34.5 | 38.7 | 42.7 |
| 315 | 7.7 | 8.7 | 12.2 | 13.7 | 17.9 | 20.0 | 23.4 | 26.0 | 28.7 | 31.8 | 35.0 | 38.7 | 43.5 | 48.0 |
| 355 | 8.7 | 9.8 | 13.7 | 15.3 | 20.1 | 22.3 | 26.3 | 27.2 | 32.3 | 35.8 | 39.5 | 43.6 | 49.0 | 54.1 |
| 400 | 9.8 | 11.5 | 15.4 | 18.0 | 22.7 | 26.3 | 29.7 | 34.4 | 36.4 | 42.1 | 44.5 | 51.4 | 55.2 | 63.7 |
| 450 | 11.0 | 12.9 | 17.4 | 20.3 | 25.5 | 29.5 | 33.4 | 38.7 | 41.0 | 47.4 | 50.0 | 57.7 | – | – |
| 500 | 12.2 | 14.3 | 19.3 | 22.4 | 28.4 | 32.8 | 37.1 | 42.9 | 45.5 | 52.5 | 55.6 | 64.1 | – | – |
| 560 | 13.7 | 16.0 | 21.6 | 25.1 | 31.7 | 36.7 | 41.5 | 58.0 | 51.0 | 58.8 | – | – | – | – |
| 630 | 15.4 | 18.0 | 24.3 | 28.2 | 35.7 | 41.3 | 46.7 | 54.0 | 57.3 | 66.1 | – | – | – | – |
| 710 | 17.4 | 20.3 | 27.4 | 31.8 | 40.2 | 46.5 | 52.6 | 60.7 | – | – | – | – | – | – |
| 800 | 19.6 | 22.2 | 30.8 | 35.7 | 45.3 | 52.3 | – | – | – | – | – | – | – | – |
| 900 | 22.0 | 25.5 | 34.7 | 40.2 | 51.0 | 58.8 | – | – | – | – | – | – | – | – |
| 1000 | 24.2 | 28.3 | 38.5 | 44.5 | 56.7 | 65.3 | – | – | – | – | – | – | – | – |
Designed to withstand high pressures, ensuring long-term performance in demanding environments
Highly resistant to chemical corrosion, providing longevity in aggressive environments
Compatible with fusion welding, mechanical coupling, and adhesive bonding for seamless integration
Requires minimal upkeep, leading to lower maintenance costs over time
Yes. The metal shell of the fitting provides structural strength and pressure rating, usually in line with standard piping classes (e.g., ANSI/ASME). The HDPE lining is designed to withstand internal pressure and thermal expansion without delaminating.
HDPE lining offers superior chemical resistance, reduced friction, and enhanced durability. It safeguards the internal surfaces of metal fittings against corrosion, scaling, and aggressive chemicals—greatly extending their service life in demanding conditions.
HDPE (High-Density Polyethylene) lined fittings are pipeline components such as elbows, tees, reducers, and flanges that have a carbon steel or other metal exterior for strength, lined internally with HDPE for corrosion and abrasion resistance. They’re commonly used in industries handling aggressive chemicals or slurry.
HDPE lined fittings are commonly used in mining slurry systems, chemical processing, water and wastewater treatment, power plants, and desalination units for their corrosion resistance and long-lasting performance in harsh environments.
The metal portion can be welded using standard practices, but care must be taken not to damage the HDPE liner. Field repairs of the liner itself are limited and usually require specialized tools or returning the item to the manufacturer.
We are the leading Manufacturer and Supplier of Grayson PTFE Lined Pipe, Fittings, Flanges, Spool and Valves in Midland, UK.
