Approved Factory from Japanese Sewage Association 

Steel segment is fabricated by standard hot rolled mild steel. It is designed to have higher strength, easy for transportation, better capability in situ modification, and higher tolerance.
Generally, it is designed for cross passage, small radius of tunnel curving. for example like underground cable tunnel, and gas tunnel.
Unicrane welders have achieved to certify from JIS welding test, so the welding technique is having a much better quality assurance. With our production arrangement and managing experience, Our capacity for fabrication of steel segment could reach to 30,000 rings per year.
Unicrane is also a factory that has been qualify from Japanese sewage association. so we are able to sell the steel segment back to Japan for sewage purpose (there are only 2 factories in Asian countries that has been approved from Japan sewage association, and Unicrane is one of it).

Unicrane Machinery is cooperating with Nippon Hum Concrete  to applied for Japanese sewage association and it has been approved by 2013, Feb. Scope of fabrication specification are from Outter diameter of 1800~8300mm.