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Supplier of and Manufacturer in, exotic Stainless Steels - Flanges, Fittings, Fasteners etc

Hydrobolt Ltd

An [ISO 9001] manufacturing company located in the UK. Approved to many globally recognised EPC's / OEM 's AVL's. We are currently working towards the ISO 14001 & ISO 18001 accreditations.

The group runs a fully integrated ERP software to manage materials and monitor production. This systems allows for rapid responses to customer needs, high quality and reproductability at the most economic route possible.

Hydrobolt Ltd has extensive experience both domestically and internationally in the supply of both petrochemical/manufactured fasteners/turned parts and Pipeline commodities – pipes, fittings, flanges, gaskets and associated product. Supply ranges across (but not limited to) the Up, Mid and Downstream, Power and Process, Hydro / thermal power generation (OEM AVL manufacturer of Gas/Steam Turbine components) to nuclear power generation – Flask Lid bolts and RCP bolting


Fastener/turned part material(s) [primarily] worked in (but not limited to) are Carbon/Stainless Steels:

  • Inconel (600, 625, 718, 800 and 925)                                             
  • Monel (400, K500)
  • Hastelloy (C22 and C276)
  • Nitronic (50 and 60)
  • Nimonic 80A
  • 21CrMoV57
  • Durehete 950 & 1055
  • X19 & X22
  • 1.7729
  • 31803 (Duplex)
  • 32760 (Super Duplex) SA, FG and FLT
  • 660A, B and D
  • B7/2H
  • B7M/2HM
  • L7/Gr 4
  • B16
  • B8C, R and S
  • B8/M and T class 1 and 2

Parts can be coated in specific requirements ranging from Zinc, Hot Dip Galvanizing, PTFE, Cadmium and others in between. Other ancillary process offered are heat treatments, quenching and tempering, nitriding and solution annealing to name but a few. Parts are manufactured to both existing standards eg DIN, ASTM etc and to bespoke [client specific] technical drawings.


The Pipeline division within the group compliments the established supply scope and enables Hydrobolt Ltd to be  a “one-stop-shop” small/medium package supplier.

The division’s niches are:

  • Special flanges and fittings made to order – bespoke technical drawings especially in materials such as Duplex/Super Duplex.
  • Small/Medium packages - pipeline and associated product(s).
  • API subsea flanges, crosses, tees.
  • Other standards worked to are; NORSOK, ANSI and Euronorm.
  • Heavy wall items.
  • High pressure/Special ratings.
  • Hi yield carbon Steel.
  • Finned tube
  • Special testing requirements, “in house”.
  • Sheet
  • Plate

The division’s key strengths include:

  • Quality
  • Integrity
  • Managed supply chain
  • Fast turnaround
  • Industry Experience
  • Flexibility
  • Product knowledge
  • Single source for projects

Parts are offered with a range of certification, from COC, 3.1b to 3.2, all dependant on the order requirement from an individual client.

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