Denver, Colorado
Manufacturing Capacity: 
Welded steel pipe in sizes 20" OD through 123" OD with material thickness ranging from 0.135" through 0.750".
Capabilities, Products and Services:
Full-service welded steel pipe manufacturer offering comprehensive engineering and estimating services. Production capabilities include 2 spiral-weld mills, complete fabrication, as well as linings and coatings as described below.
Spiral Weld Steel Pipe:
(Laser Guided Double-Submerged arc welded)
- Sizes: 20" OD through 123" OD
- Wall thickness: 0.135" through 0.750"
- Hydro-tested lengths: 20' through 60'
- Non-hydrostatically tested lengths: 80'
- 100% Ultrasonic tested spiral weld per API 5L, RT Full Radiographic (x-ray)
Plate Rolling & Welding:
- Sizes: 20" through 144"
- Max Plate Thickness: 0.625"
Typical Manufacturing Specifications:
- AWWA: C200
- ASTM: A139 All Grades, A252
End Treatments:
O-Tite® rolled groove O-ring gasketed bell and spigot, weld bell and spigot, mitered weld bell, Victaulic weld-on and roll groove, flanged and flexible couplings, Carnegie bell and spigot, square cut, plain end, beveled ends.
Linings and Coatings:
Linings
- C205 Cement-mortar: Sizes 20" through 96", NSF Certified
- C210 Liquid Epoxies: Sizes 24" through 108"
- C222 Polyurethane: Sizes 20" through 108"
- Specialty paints: Sizes 24" through 108"
Coatings
- C209/214 Polyethylene Tape: Sizes 20" through 122"
- C210 Liquid Epoxies: Sizes 17" through 122"
- C218 Primer, Specialty Paint: Sizes 17" through 122"
- C222 Polyurethane: Sizes 17" through 122"
Available Shipping:
Rail, truck, intermodal
Northwest Pipe Company
6030 North Washington Street
Denver, Colorado 80216
(303) 289-4080
(800) 289-4080
Operations Manager: Frank Knafelc
Sales: Neal Kelemen
