Trenchcoat pipe

Modern continuous galvanising techniques ensure that our drainage pipes and stormwater tanks are highly durable. To begin with, they are all manufactured to Highways Agency Standard BD12, which requires a design life of 120 years.

For aggressive and very aggressive environments, our pipes and tanks can be finished with a choice of coatings of Trenchcoat polymer. This gives a product with the unique strength of steel and the durability of polyethylene – an unbeatable combination. Trenchcoat secondary coatings (seen black in our photo gallery) are applied to both sides of a pipe and will add at least another 60 years to the system's service life.

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Key features & applications
Key features of trenchcoat pipe
- Manufactured to Highways Agency Standard BD12
- Coatings to suit varying levels of aggressive environment
- Used successfully around the world for many years
Trenchcoat polymer coatings are applied to any pipe or tank system which requires particular resistance to aggressive environments such as:
- Acids
- Alkalis
- Salt water
Technical specifications & calculations

Download trenchcoat pipe specifications (PDF)

Trenchcoat pipe brochure

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Product range and sizing

We manufacture Trenchcoat finished pipe to meet any requirement, whether for dead or for live loads.
Check our range or consult us to establish the appropriate specification.

Corrugation

Trenchcoat pipe is manufactured in 68 x 13mm and 125 x 25mm corrugation.

Size

Available in diameters from 0.3m to 3.6m and gauge range from 1.5mm to 3.5mm.

Standard length is 7m but pipe can be made in any length from 3m to 12m to suit customer requirements.

Fabrication

An extensive range of fabrications is available, including elbows, T's, shafts and pump chambers.

Size range Helibore 68
Clear internal diameter (m)	Weight per metre (kg)					Clear end area (m²)
	Steel thickness (mm)
	1.5	2.0	2.5	3.0	3.5
0.3	14	-	-	-	-	0.07
0.4	18	-	-	-	-	0.13
0.5	23	-	-	-	-	0.20
0.6	27	36	-	-	-	0.28
0.7	32	41	-	-	-	0.38
0.8	36	47	-	-	-	0.50
0.9	41	53	66	79	90	0.64
1.0	45	59	73	87	100	0.78
1.1	50	65	80	95	109	0.95
1.2	54	72	89	106	118	1.13
Indicative weights for galvanised pipes

Size range Helibore 125
Clear internal diameter (m)	Weight per metre (kg)					Clear end area (m²)
	Steel thickness (mm)
	1.5	2.0	2.5	3.0	3.5
1.2	55	73	90	108	124	1.13
1.4	65	85	105	125	145	1.54
1.5	69	91	113	134	156	1.77
1.6	74	97	120	143	166	2.01
1.8	83	109	135	161	187	2.55
2.0	92	121	150	178	207	3.14
2.2	102	133	165	196	227	3.80
2.4	-	145	179	214	248	4.52
2.6	-	-	194	231	268	5.31
2.8	-	-	-	249	289	6.16
3.0	-	-	-	267	309	7.07
3.2	-	-	-	-	329	8.04
3.4	-	-	-	-	350	9.08
3.6	-	-	-	-	371	10.18
Indicative weights for galvanised pipes

Gallery