Alchem Process Ltd
Unit 4 Church Road Ind Estate,
Gorslas, Llanelli, Carmarthenshire,
SA14 7NN.
Tel: 00 44 (0) 1269 841 324

Manways and Inspection Hatches

High Pressure Manways, to CODAP 2000

Download Data Sheet in PDF Format: 

High pressure manways are now common place in the Pharmaceutical, Biotech, Food, Dairy and Beverage industries.  Manufactured as standard from 316L stainless steel our high pressure manways offer the following features and options.


  • Sizes -  from Ø150 through to Ø600mm
  • Material - 316L and 304L stainless steel
  • Carbon Steel - P265 GH specials available to order
  • Exotic nickel alloys offered such as 316Ti (1.4571) and Uranus B6
  • 20 Bar - Working pressures and full vacuum rating on smaller diameters
  • Material certification to EN10204 3.1.B
  • PED 97/23/CE - Certification to the European Pressure Directive
  • FDA approved seal materials including silicone, EPDM, FEP and FKM encapsulated
  • Welding procedures & approvals to EN 288.3 & EN 287.7 and ASME QW-484



  • Spring assisted hinges on large doors – Link to photo
  • Security locks to prevent dangerous blow-back in a pressure environment – link to photo
  • Surface finishes to 0.3 µM Ra available to order
  • Internal security grid and wire crosses
  • Range of nylon handles or stainless steel wing nuts
  • Extended neck rings to form small vessel walls
  • Air operated locking devices



A full fabrication service is offered for our manways including sight glasses, charge ports, inspection hatches and pressure relief valves.  The manways can also be fabricated to form reactor vessels where the neck rings are extended to form the body of the vessel. 


Safety Devices:

  • Safety Bolt for pressure & vacuum release – Link to explanation and photo on the last page
  • Air Actuated Locking Device – Link to explanation
  • Magnetic Proximity Switches - Link to explanation
  • Security Grids, Meshes and Crosses  - Link to explanation