Blast-Resistant Doors

Blast-Resistant Doors JSC "Alfa" are used for blast protection of industrial and special facilities, where confirmed explosion resistance of the door unit, preservation of the opening and the possibility of evacuation after the impact of the shock wave are required. The section helps to select blast protection structures by class, test parameters and requirements of GOST R 57471-2017.

The barriers of the industrial explosion series are intended mainly for oil and gas, petrochemical, chemical complex facilities, enterprises producing pyrotechnics and ammunition, large railway junctions.
Evaluation of suppliers Demand video confirmation of the tests! In order for the door to correspond to the class of VZ 50 GOST and P 57471, it must be tested by detonating at least 500 kg of TNT at a distance of not more than 30 meters. And with the class VZ 100 - at least 1000 kg of TNT at a distance of not more than 25 meters. At the same time, the door after the explosion should not be punched, deformed and should normally open (the escape route!). The test sample shall be larger than the product supplied or larger than 2600×2600.

The market is full of counterfeits!

Fire-blast-resistant doors universal Technical specifications 7399-037-26448436-2017

DPHW 50(A)

compliance with category and class of blast protection

VZ 50(A) GOST R 57471-2017 of 1

It maintains protective properties when

Parameters of VHV in certification tests:

Δ P* = 63.2 kPA maximum excess pressure

passing

Charge with TNT equivalent - 500 (five hundred) kg

distance from the center of the charge during detonation

to the center of the obstacle - 30 meters

"Armored" MFA - 1 kPa.

DPHW 100(A)

compliance with category and class of blast protection

VZ 100(A) GOST R 57471-2017 ism 1

It maintains protective properties when

Parameters of VHV in certification tests:

Δ P* = 340 kPA maximum excess pressure

passing

Charge with TNT equivalent - 1000 (Thousand) kg

distance from the center of the charge during detonation

to the center of the obstacle - 25 meters

The only known barrier tested by TNT equivalent tothe actual emergency explosion, andcertified according to GOST R 57471-2017izm. 1st

Fire resistance (GOST 53307-2009)EI60, EI90, EI 120 (to order)depending on the filling of the canvases. Tests onfireproof on the doors, alreadyblast-testedAvailable burglar-resistant (Class I)execution in accordance with GOST 34613-2019Due to the safety margin, the doors during the explosion are deformed, which allows unimpeded evacuation of personnel or withstand the fire. Fire resistance tests were carried out on a specimen already exposed to explosion. Improved performance:

Triple circuit seals - increased gas density.
The use of a soft fire-resistant thermocompensator is not destroyed in the explosion
Three-point steering lock system.
Stainless steel handles (withstanding a force of 500 kg).
The outer sheet is 6 or 8 mm thick.
Convenient and easy installation without concrete (mounting units tested)
It is possible to achieve CST - 1.2 m2·C / W, the total thickness of the canvas is at least 160 mm

Cheap doors of class VZ 5 (A) - in the section of explosion-resistant barriers

The video below shows the tests of explosion-proof doors by detonating a TNT charge and certification tests according to GOST R 57471-2017 with change 1. For designers, this is a confirmation of the actual resistance of the barrier and the performance of the product after an explosion.

Trials. Undermining 1 ton of TNT	Video certification tests GOST R 57471-2017ism. 1st

dovs

Frequent Questions About Explosion Doors

What confirms the explosion resistance of the door?

The design characteristics are confirmed by tests with known charge mass, distance and shock wave parameters. For classification apply GOST R 57471-2017 with change No. 1.

What does the VD class mean?

The class characterizes the resistance of the barrier under normalized explosive impact. Selection is performed according to the design load and the required condition of the door after the explosion, including the possibility of normal opening.

Can blast protection and fire resistance be combined?

Yes, fire retardants are available with fire resistance limits EI 60, EI 90 and EI 120 to order.

Frequent Questions About Explosion Doors

What confirms the explosion resistance of the door?

What does the VD class mean?

Can blast protection and fire resistance be combined?

Category

Blast-Resistant Doors: frequent questions

How are blast-resistant doors different from conventional reinforced doors?

What questions does this section cover?