• Corrugated Steel Pipe Manufacturers Standard: ASTM A**9/A**9M****1  AASHTOM******3
• Production Line: We import corrugated pipe culvert production lines from Germany, with certification of ISO***1:***8  OHSAS****1:***7  ISO****1:***4  CCPC(China Communications Products Certification) we ensure the cargo to you is quality
• Labs: We have tensile strengt, thickness test after raw material into plant, pressure wave, type blending test in production, they all strictly controlled by quality record

Corrugated Steel Pipe(CSP) also named corrugated metal pipe(CMP), it is an ideal material for culvert bridge projects based on its low cost, widely variety of diameters and layout configurations, It will not crack under impact loads or vibrations due to the inherent strength of steel and the flexibility of the corrugated pipe section, The high ring compression of the pipe absorbs and transfers the load to the surrounding soil around the entire circumference, The beam strength maintains the grade and line of the structure by bridging inequalities of the trench bottom and side fill.

Advantage compare to other material:

• Environmentally, economical, versatility and flexibility in design and installation
• Predictable service life more than **0+ years
• Variety-wide range of gages, corrugations and shapes in diameter ranging from *2"***4"
• Structual integrity-with the strength and integrity of steel-soil structure interactions, XSP/CMP offers unparalled strength
• Customizable-a variety of fittings, tees and elbows allow CSP/CMP to match most layout configurations
• Can be designed for heavy loading and high maximum height of cover requirements
• High strength and durable