In combination with the VOSSRing preassembly studs, VOSSRingM also meets the highest demands placed on assembly reliability and leak prevention, as confirmed by a series of certifications such as the recent permit for gas applications.
The cutting ring had already been granted certificates for the marine and offshore sectors from all major international classification societies. It is now seamlessly integrated into the fluid specialist’s complete range of couplings: They are mostly approved for both the marine and offshore sectors as well as for gas applications. One particularity is certification of the 24° conical seal couplings (German DKO) for the gas sector.
For marine and offshore industry applications, the metallic sealing VOSSRingM, VOSS Fluid provides an appropriate solution with over-tightening protection. DNV • GL has tested the cutting ring and released it for the international market for a maximum nominal pressure of 800 bar. The release also applies to operation with hydraulic and lubricating oil, heavy fuel oil, steam and even for the safe transport of fresh and seawater.
The auditors in DNV • GL also performed bursting pressure, leakage and combined pressure impulse and bending fatigue strength tests. During this, the VOSSRingM achieved the highest degree of protection against leaks and compressive strength. The cutting ring achieved its special ease of assembly by combining it with the VOSSRing preassembly tool. Due to the zinc nickel coating, it also provided long-lasting corrosion protection even in contact with saltwater.
On top of that the cutting ring is approved by additional certification companies of the IACS (International Association of Classification Societies).
The VOSSRingM is also approved by DVGW for the transport of compressed air, gas and liquid gas by public gas companies in Germany. The maximum operating pressure (MOP) here according to the DVGW certificate is allowed up to 250 bar. The operating temperature is stated for a range between -20°C and 60°C. Furthermore, a constituent of the certificate is approval of the 24° conical seal couplings (DKO). The conical seal attached to the coupling body creates an especially secure and permanently stable access connection. The connection also attains its high degree of fine leakproofness through an embedded O-ring.
Read the article online at: https://www.oilfieldtechnology.com/hse/13062017/vossringm-certified-for-marine-and-gas-applications/