Gas Turbine Coupling Bolt

Damian Lewis


DOOSAN HEAVY INDUSTRIES & CONSTRUCTION Co, LTD, a subsidiary of Doosan Group, is a heavy industrial company in South Korea established in 1962.

Its business includes manufacturing and construction of nuclear power plants, thermal power stations, turbines and generators, desalination plants, castings, and forgings. In 2013 they decided to enter the large gas turbine business.

In 2019 DOOSAN were ready to test the 270 MW, DGT6-300H unit. Doosan needed a high integrity bolt solution and decided to invite PILGRIM INTERNATIONAL LTD along with several other Bolt specialist companies to review and propose a bolting solution


On review of the specification, PILGRIM went to work providing a technically and commercially acceptable offer utilising Pilgrim’s Radial Fit Bolts (18 off), a Single Bolt Tensioning Kit and Hydraulic Hand Pump. In addition the requested delivery was less than 6 weeks from order placement.


  • High performance bolt design with good safety factor.
  • Application specific design high integrity bolts
  • Market leader of radial fit bolt with 1000’s of references going back 30 years.
  • Quick turn around of supply