Photovoltaic pipeline earthquake-resistant support

What are earthquake-resistant and subsidence-resistant ductile iron pipelines?

This document specifies the design of earthquake-resistant and subsidence-resistant ductile iron pipelines suitable for use in areas where seismic activity and land subsidence can be expected. It provides a means of determining and checking the resistance of buried pipelines and gives example calculations.

Are ductile iron pipes earthquake-resistant?

Ductile iron pipes have proven their outstanding performance in numerous earthquakes without damage. The origin behind the development of the S-type joint, the first of these earthquake-resistant joints (the mechanisms for connecting pipes), was the 1964 Niigata earthquake, which registered a magnitude of 7.5.

What is seismic support for pipes?

Seismic support for pipes involves designing and implementing a system of hangers and bracing that can withstand the forces generated by an earthquake. These types of support systems aim to: Maintain Structural Integrity. By resisting seismic forces, they prevent pipes from detaching or collapsing. Protect Surrounding Areas.

Why are earthquake-resistant pipes so important in Japan?

The importance of earthquake-resistant pipes in Japan was highlighted by the Kobe Earthquake in 1995. Following this event, the ratio of earthquake-resistant pipes among all ductile iron pipes increased significantly, from approximately 80% the year after the launch of GENEX to around 95% in 2017.

Is Kubota ductile iron pipe earthquake resistant?

This earthquake-resistant ductile iron pipe (NS-type, 200mm nominal diameter) was exposed after a road collapsed in the tsunami caused by the Great East Japan Earthquake. No fragments or damage were found, proving the pipe’s outstanding seismic resistance. The Kubota spirit is faithfully being handed down to young engineers.

Why is flexibility important in seismic pipe support design?

While it might seem counterintuitive, flexibility is a crucial consideration in seismic pipe support design. The supports need to be sturdy enough to maintain pipe integrity, but flexible enough to absorb and dissipate seismic energy.