Technical Info

Fully compliant and customizable doors

Our G21 blast resistant doors have been designed, manufactured and extensively tested by InterDam BV. These heavy duty blast doors are in full compliance with all fire and blast resistance requirements, and have fire approval from DNV, Lloyds, ABS and USCG. All doors are customized upon clients’ fire rating (and blast) requirements.

Proven blast resistance

The G21 blast door design has been blast tested up to 1.1 bar blast. If needed, we can increase blast resistance through calibrations of our test results using ANSYS analysis. Every door comes with a detailed Basic Design Report written by engineers demonstrating blast code compliance.

Solid, fire-resistant material
Door leafs are constructed from two galvanized or stainless steel sheet metal panels, sandwiching a heavy duty fire resistant core and solidly assembled to form an extremely rigid, flat panel.
Easy installation
Each G21 blast resistant door is supplied as a single, fully pre-assembled unit. It is ready for wall installation with certified self-tapping screws through predrilled holes in the frame, or by welding if preferred. Once installed, it will operate as a normal steel door.
Durable, architecturally-pleasing hardware
All accessories such as latches, handles and hinges are made of durable and architecturally-pleasing solid stainless steel 316 quality to ensure integrity of the doorunits in more severe conditions.

All doors are provided with the following hardware:

• Three stainless steel 316 hinges per door leaf
• Two stainless steel 316 handles with escutcheons
• Seals with protection strips (to guarantee weather-fitness and gas tightness)
• A heavy duty door closer

A variety of options
Our blast resistant doors can also be modified to include:
• Fire resistance to meet specific requirements
• Integrated fire and blast resistant vision panels
• Larger sizes
• Automatic operation
• Compatibility with access control systems