Sealing
produced in regions where conditions favour the production of renewable energy. As such, ammonia is a promising hydrogen carrier and fuel to decarbonise maritime industry. To ensure further safety and increase the capability to handle large, expected import quantities, new technology must be developed and existing technology for storage, transportation by ships and / or pipeline and( off) loading should be upgraded. To proactively contribute to the safety effort necessary for the development of decarbonised ammonia and in partnership with major players in the sector, Omniseal Solutions has conducted a complete thermoplastics materials testing programme, ranging from aging to tribological characterisation. In doing so, the company can provide valves and transfer equipment to customers with reliable and durable sealing solutions quickly. The following are the test conditions for ageing in compliance with NORSOK M-710, Edition 3 and ISO 23936-1:2022:
Soak Media
Soak Temperatures / Pressures
Soak Durations
100 % Ammonia
-46 ° C(± 3 ° C) 9 bar – liquid phase
25 ° C(± 3 ° C) 9 bar – gas phase
82 ° C(± 3 ° C) 60 bar – liquid phase
7, 14, 28, 42, and 56 days
Pin-on-plate
According to these test results, every selected material successfully passed the acceptance criteria for tensile properties, mass and volume change. All third-party certificates are available upon request. Furthermore, pin-on-plate tribological testing was performed on the same thermoplastic materials in 100 % liquid ammonia to characterise their coefficient of friction and wear mechanisms.
Media Temperature Applied Load Stroke / Speed Duration
100 % Liquid Ammonia Ambient 400 N 25 mm / 1.0 Hz 14 hours
Based on the composition of each tested material, the behaviour of wear and the ranking of each material is in line with expectations and not impacted by liquid ammonia. The measured CoF is also considered very well within the expectations.
Omniseal Solutions’ polymer & metal seals for H2 pipeline valves
Safe hydrogen pipeline transport with certified thermoplastic materials
According to consulting firm Guidehouse, Inc. paper titled“ European Hydrogen Backbone Implementation Roadmap” published in April 2024, building a H2 pipeline network is central to the energy transition but needs public support as a catalyst. A H2 pipeline infrastructure allows for H2 to be produced in low-cost renewables regions and delivered to demand centres. The European Hydrogen Backbone( www. ehb. eu), which is based on existing and new pipelines, gathers the main transmission system operators. The use of existing natural gas pipelines for hydrogen transport, whether through blending hydrogen with natural
20 Valve World May 2025 www. valve-world. net