Many types of pressurized equipment are protected by rupture discs which are installed in special flange-like holders that capture and seal the discs, preventing leakage of the process fluid. To ensure proper functioning when used in corrosive process fluids the integrity of the holder as well as the disc must be retained as corrosion can cause premature failure. Tantalum is an industry accepted material used to prevent corrosive attack over time for these assemblies. Tantaline® treated holders are highly compatible and well suited for use with tantalum or graphite rupture discs found in a wide range of industrial processes. The resulting assembly provides reliable protection and extended service life of the associated equipment.
Tantaline® treatment is a cost-effective option for achieving long term corrosion resistance and reliable sealing for the various holder types. The Chemical Vapor Deposition (CVD) process used by Tantaline produces a uniform tantalum layer that conforms to complex geometries and adheres to the substrate through diffusion bonding. The resulting smooth tantalum surface ensures proper sealing of rupture disc in the holder and prevents corrosive process fluids from adhering to the metal surface. Tantaline® treated rupture disc holders offer chemical and mechanical performance superior to those made of Hastelloy®, titanium or zirconium along with economical pricing and short lead-times.
Type of rupture disc holders suitable for treatment:
- Insert holder
- Bolted holder
- Screw type
- Union type
- Flat seat
|MARKET||TYPICAL PROCESSES||TYPICAL USES|
|Chemical Processing||Hot acids, wet and dry chlorine, sulfur compounds, sour gases containing hydrogen sulfide (H2S) compounds||Reactors, chillers, heat exchangers, safety relief valve isolation, and desulfurization units|
|Oil & Gas||Acid gases (CO2, H2S, SO2), ammonia (NH3), hydrogen cyanide (HCN), alkylation, and amine derivatives||Distillation columns, separators, LNG processing equipment, process columns, vessels, storage, and transport|
|Pharmaceutical||Oxidizing agents (hydrogen peroxide, bromine, chlorine)||Fermenters, bioreactors, and process vessels|
|Pulp and Paper||High temperature concentrated acid, sulfur gasses including H2S and SO2, bleaching compounds, acid slurries and acid pulps||Bleaching systems, gas recovery, discharge headers, and tanks|
Key Technical Information
Stainless Steel, Hastelloy®*, Inconel®** rupture disc holders are susceptible to Stress Corrosion Cracking (SCC) and pitting especially in hot acids.
Tantaline® treated rupture disc holders offers the following beneficial characteristics:
- Chemically resistant to SCC and pitting in many aggressive media and environments.
- Tantalum layer remains passivated and inert to corrosion under high temperature (>200° C) acidic conditions including concentrated HCl and H2SO4.***
- Superior corrosion resistance against wet, dry chlorine atmospheres and other chlorinated environments.
**Inconel® is a trademark of Special Metals Wiggin Limited
***FJ, H. (n.d.). Properties of Tantalum for Applications in the Chemical Process Industry