In municipal water supply and drainage pipeline projects, ductile iron pipes have become the material of choice due to their outstanding strength and corrosion resistance. The unique design of the T-joint provides the pipeline system with a℃of "flexibility"-it can be installed with bends within a specified angle. This characteristic significantly enhances the adaptability of pipeline laying and construction efficiency. Today, we will delve into the bending installation techniques for T-joint ductile iron pipes.
T-type joints
T-type joints, also known as slip-fit flexible joints, are characterized by their ability to be installed quickly with only basic tools. The core advantage of this joint lies in its specialized sealing ring design and socket structure, which allows for angular deflection at the pipe connection without compromising sealing performance. Deflection in each individual pipe segment enables deflection of the entire pipeline.
Ductile iron pipes with T-type joints cannot be arbitrarily bent. When pipe deflection is required, it can be achieved by deflecting the pipe at the joint within the permissible angular deflection range.
| DN80-DN200 | 5℃ |
| DN250-DN350 | 4℃ |
| DN400 | 3℃ 30′ |
| DN450-DN600 | 3℃ |
| DN700-DN900 | 2℃ 30′ |
| DN1000-DN2000 | 2℃ |
In actual engineering projects, the deflection angle during construction typically does not exceed 75% of the design allowable value to ensure a safety margin. Through the cumulative effect of deflection at multiple joints, the piping system can achieve significant angular changes in direction, meeting the requirements for curved pipe routing in engineering projects.
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