Emergency Relief Manways

Emergency Relief Manways - TankVent

CNC 121 Series of Emergency Relief Manways. Motherwell Tank Protections CNC 121 Series are manufactured in our UK manufacturing plant to exacting quality standards and backed by over 40 years experience.

Product Information

Request a Quote for Emergency Relief Manways

  • Specifications
  • Supporting Document (Optional)
  • Max. file size: 50 MB.
  • Hidden

They are available with a variety of options which include

  • Sizes range from 10″ (250mm) to 36″ (900mm).
  • Made from Carbon Steel and Stainless Steel, Aluminium covers also available
  • Manufactured to clients flange requirements
  • Non flanged option available
  • All manways are set and tested to the clients requirement up to 90Mbarg
  • Various designs available to suit your requirements

MTP 121 Series non-sparking emergency relief manhole covers permit access to low pressure storage tanks and provide emergency venting capacity in the event of fire. They are used extensively on bulk storage tanks, including floating roof tanks.

Table 1. Emergency Relief Vent Options
Description Materials / Options
Size Range 10″, 12″, 18″, 20″, 24″, 26″, 28″, 30″, 32″, 34″, 36″
Process Connections API 650 (20″ and 24″), ANSI 150#, Special at no extra cost
Materials Aluminium, Cast Iron, Carbon Steel, Stainless Steel, Special
Diaphragm & Insert PTFE
Weights Lead Plate (standard), Stainless Plate (special)

Request a Quote for Emergency Relief Manways

  • Specifications
  • Supporting Document (Optional)
  • Max. file size: 50 MB.
  • Hidden

Still Need assistance? Our engineers Can help


It is still possible that we have it!

Purple Engineering is providing a wide range of Pipeline and Oil & Gas equipment. It is possible that we have the product you are after or know who in the market has it! Please call us and we can confirm if we have the item you are searching for.


We have a wide range of oil & gas related equipment

Purple Engineering is an Australian based company and we have a wide range of equipment for Onshore & Offshore Pipeline, Oil & Gas and Power Generation industries. Please Email us the spec of the item you rquire & we will confirm the availability.

Why Choose Purple Engineering?

We are your friends in the field and we are providing a lot of different styles of Tank Vents for your specific needs. Call us and you will feel the difference.

Get in Touch

Our Valued Clients