Marine

Viega fittings obtain Navy approval


Written by

Nick blenkey

Viega MegaPress CuNi fittings

Naval Sea Systems Command (NAVSEA) has approved the use of Viega MegaPress CuNi mechanically fastened fittings in sizes ½ “to 2” in surface fighters for a variety of systems including chilled water, potable water , electronic fresh water cooling, sea water cooling, washing, drainage and other countermeasures.

Viega ½ ”ProPress copper fittings have also been approved for potable water and various drains.

“NAVSEA is arguably the strictest standard in the world and obtaining this approval has been a long-standing goal of Viega,” said Marine Director TJ Tracy of Viega LLC. “This is an affirmation of the reliability and durability of our fittings, even under the most demanding circumstances. “

Pressing pipes offers the Navy, shipyards and contractors two major advantages.

The first is fire mitigation. Fire is one of the greatest dangers in the construction, repair and maintenance of ships. There were over 600 documented shipboard fires between 2017 and 2020. A recent analysis by the Society of Naval Architects and Marine Engineers found that more than half of the fires were caused by hot work, such as the welding and brazing.

In July 2020, welding sparks started small fires on Navy ships at two separate shipyards. Although they were quickly extinguished, the fires resulted in work stoppages as safety measures were reviewed. That same month, the amphibious assault ship Bonhomme Richard burned for four days while on the San Diego wharf. Repairs were expected to take six years and cost $ 3 billion, so the Navy was forced to decommission the ship 18 years earlier than expected.

Because pressing does not require heat, flame, or an external power source, it eliminates the risk of fire when assembling the pipe. It also makes it unnecessary to display a fire watch or prepare the job site for hot work.

The second advantage is the reduction in costs and manpower. Pressing can reduce installation time by 70% compared to traditional pipe assembly methods. When coupled with savings in system testing, due to near zero leakage, the cost and schedule benefits easily outweigh the investment. Studies by NASSCO show that testing pressed pipe fittings costs less due to fewer leaks, repairs and retesting.

“Viega has helped the Commercial Navy and other industries benefit from the pressure for years and we are excited to bring this technology to our defense partners,” said Tracy. “We are proud and confident that our fittings will make pipe assembly safer, faster and more efficient on Navy ships. “

The primary fitting approved by NAVSEA is MegaPress CuNi, a 90/10 copper-nickel alloy specially designed to withstand harsh marine environments. It can be used on Schedule 40 and Class 200 90/10 copper-nickel pipe. The second is the ProPress copper fitting system, which offers over 400 different configurations and three different sealing elements: EPDM, FKM and HNBR.

The Navy approval follows many other Navy related approvals for Viega products. The US Coast Guard, American Bureau of Shipping, DNV, Lloyd’s Register, Bureau Veritas, and RINA have all already approved the use of Viega fittings in marine environments.