Spiral rib pipe can solve your storm water problems with the improved hydraulics

Spiral rib pipe is our innovative flexible metal pipe that combines the proven strength of corrugated metal pipe with the flow capacity of a smooth inner wall. That is to say the product has two layers: the first layer is a smooth interior corrugated steel pipe and the second layer is a smooth steel liner providing for improved hydraulics. It is also called smooth wall spiral rib pipe or double wall corrugated steel pipe. It is economical and easy to install. It combines the advantages of many piping varieties into one revolutionary product. Spiral rib pipe is lightweight, easy to use and install, high strength, long-lasting and with superior performance therefore it is the perfect pipe that used for storm water sewer systems, culverts and drainage systems.

Spiral rib pipe features and benefits

Revolutionary hydraulic design: Spiral rib pipe has better hydraulics than the traditional metal pipe and manning’s n factor is 0.012 therefore it is allowed to be used interchangeably with concrete pipe and plastic pipe without affecting flow capacity.

Strength and durability: Spiral rib pipe is stiffer than HDPE pipe so it is less inclined to deflect and fracture. It maintains the project grade longer than concrete pipe due to the positive joint connection and long pipe lengths. Various metals and coatings are available depending on site conditions. Customers can match the metal and coatings with the site conditions to achieve the best engineering design service life and economic efficiency.

Cost savings on installation: Steel spiral rib is only weighs only 10% as much as concrete pipe while the aluminum spiral rib weighs only 3% as much. With the weight reduction it is easy to install and can save a lot of money on labor costs.

Versatility: Spiral rib can be fabricated in virtually any length or diameter. Our company can supply non-standard pipe size to meet your projects.

Applications

Can be used for pipes and culverts

Drainage systems

Storm water systems

To suit the applications in construction, our spiral rib pipe comes in different diameters and lengths of six meters or longer. The thicknesses range from 1.6mm to 2.8mm. The material can be galvanized or aluminized type 2 steel and is about 1/12th the weight of concrete pipe.

O.D. (mm)	I.D. (mm)	Ring stiffness rank
		SN8	SN10	SN12.5
		≥8KN/m2	≥10KN/m2	≥12.5KN/m2
		External Diameter (mm)	External Diameter (mm)	External Diameter (mm)
200	200	224	224
300	300	325	325
400	400	438	438
500	500	539	539
600	600	644	644	644
700	700	745	745	745
800	800	852	852	852
900	900	963	963	963
1000	1000	1063	1063	1063
1100	1100	1173	1173	1173
1200	1200	1273	1273	1273
1300	1300	1385	1385	1385
1400	1400	1485	1485	1485
1500	1500	1585	1585	1585
1600	1600	1693	1693	1693
1700	1700	1793	1793	1793
1800	1800	1893	1893	1903
2000	2000	2105	2105	2121
2200	2200	2307	2307	2323
2400	2400	2527	2527	2533
2500	2500	2629	2629	2635
2600	2600	2729	2729	2743
2700	2700	2848	2848	2858
2800	2800	2958	2958	2973