Safe-Ring. The flange guard with diffuser and snap-lock

A spray protection ring for flange connections, which intelligently combines principles of fluid dynamics through its functional design. If a seal fails, an escaping fluid jet is effectively diminished through a special diffuser between the flanges and hazardous spraying is safely prevented. For heavy demands on plant safety.

flange guard, spray safety shield

Brochure and Technical Data

Uncompromising spray shield

Hazardous spraying is safely prevented

Polypropylene or stainless steel

Two materials, one technology

Installation and removal within seconds

No tools or additional equipment

Various diffuser widths

3 types for various flange connections

Secure fit even with vertical pipes

Diffuser in the flange gap prevents slipping

Vast assortment deliverable from the warehouse

More than 150 sizes for DIN EN and ANSI

Source of danger — flange connection.

Flanged joints on pipeline systems are an enormous source of danger and especially wherever they are used to transport poisonous, flammable or caustic liquids. In case of seal breakage, the result is a danger zone with a diameter of up to 40 metres. In order to reduce this zone to a minimum, flanged joints must be provided with a suitable form of spray protection.


Performance at its best.

Conventional spray shields that are merely mounted around the outside of a flange only deflect escaping fluid jets in the direction of the pipe when a seal fails. In contrast, with its innovative diffuser technology, the Safe-Ring provides the type of protection expected from safety equipment in the event of an emergency. the escaping fluid simply flows off downward without spraying.

Safe-Ring SRP

Material polypropylene,
red, UV-stabilised
Operational temperature range
-40 °C to +100 °C
Sizes for DIN EN 1092-1
and ANSI B 16.5

Safe-Ring SRM

Material stainless steel
(Material No. 1.4571, ASTM 316 Ti)
Operational temperature range
-40 °C to +400 °C
Sizes for DIN EN 1092-1
and ANSI B 16.5

Functional design.

The diffuser of the Safe-Ring was designed as a c-shaped channel that clamps directly between the flange faces serving as an impact and deflecting surface. In the case of damage, the flow rate of an escaping fluid jet is safely slowed down through enlargement of the cross-section and massive turbulence in the intermediate space of the flanges. The snap-lock enables installation in a matter of seconds without tools.

Appropriate for the type. There are three types of Safe-Rings with respective diffuser widths suitable for the respective flange distance of various flange combinations.

Type SS

Diffuser width for steel flange connections comprised of two weld-neck flanges (as well as two loose-type flanges with flare).

Type SL

Diffuser width for steel flange connections comprised of a weld-neck flange and a loose-type flange with collar.

Type LL

Diffuser width for steel flange connections comprised of two loose-type flanges with collar.


First stage: Countercurrent principle.

The c-shaped diffuser is clamped directly between the flange shells and serves as a rebounding and deflecting surface. The emerging medium is deflected several times on the rebounding surfaces into partial currents that flow against and cross one another. The flow rate is reduced accordingly.

Second stage: Sprinkling can principle.

The c-shaped diffuser divides the space enclosed between the flange shells and the ring jacket into partial spaces and only allows the medium to escape through the broken-through sections/holes in the diffuser. The division into further partial currents results in an additional reduction of the flow rate of the emerging material.

Third stage: Labyrinth seal.

The ring jacket with its slits/grooves ensures that the medium flowing out from the inner relief area into the outside area is deflected or swirled up even further so that a complete reduction of the kinetic energy is achieved. The medium escapes without being sprayed out.