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Kubota's ductile iron pipes are available in variety of size and for various needs.

Earthquake Resistant Joint


GX-typeDN75-DN400 (3"- 16")

*External coating: C-protect
*Lock ring is preset.


NS-typeDN500-DN1000 (20"- 40")


S-typePipe:DN1100-DN2600 (44"- 104")


US-typePipe:DN800-DN2600 (32"- 104")


UF-typeFitting:DN800-DN2600 (32"- 104")

Flexible Joint



T-type joint is push-on joint. It has flexibility and excellent water tightness.



K-type joint is mechanical joint. It has flexibility and excellent water tightness.

Restrained Joint



TLH-type is restrained joint. It is converted from T-type joint by providing the spigot with projection and assembling the special joint accessories. It can be used under high pressure and can be used with deflection.



Kubolock-T is restrained coupling. It can be simply assembled with T-type joint for restrained mechanism.



Kubolock-K is retainer gland. It can be simply assembled with K-type joint for restrained mechanism.

Flanged Joint

Flanged Joint


RF type is rigid joint. Generally, it is used to joint valves and other parts.

Jacking Pipe

Jacking Pipe

Jacking MethodDN250-DN1600

Jacking method is used to install a pipeline without trench excavation. Pipe is covered with reinforced concrete, which allows the pipe to be jacked directly into the ground without a pipe casing.

Pipe-in-Pipe Installation


PN-typeDN300-DN1500 (12"- 60")

PN-type, earthquake resistant joint is used for trenchless method into the casing pipes, aging pipes. The diameter of casing pipes can be reduced because PN-type is designed to minimize the outside bell diameter.

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