Stag B has performed and excelled as steam sealant in steam turbines, boiler feed-water pumps, boiler-areas, steam/ water/ brine pipes etc. STAG-B is resistant to a wide variety of chemicals apart from high temperature and high pressure > 170kg/cm. STAG B is a smooth consistency lead-free jointing compound with a temperature resistance of in the range of -40 degrees C to +650 degree C. It is recommended to use only Oxygen compatible thread sealant throughout the Air Separation Unit to avoid ambiguity and spurious mixing of compatible and incompatible sealant! Stag B Concerns range from the possible decomposition of any such product – through lack of knowledge about possible H-C bonds – up to the potential exposure of the paste to the fluid in case of excessive or imprudent use. However, there is a concern with paste-like thread sealants. Use of PTFE tape is well proven in numerous applications globally. If applied properly, the PTFE tape is not prone to the impact ignition mechanism – is cooled and protected by the thread itself. The PTFE tape must not protrude into the fluid. It is vital to apply PTFE tape properly without excess, use adequate tools to cut the tape and keep the working environment clean! It is recommended to use PTFE tape thread sealant for tapered threads in instrumentation impulse tubing applications. Moreover, in Oxygen service silver seal II and stag B are not recommended as these are oil-based. The physical deformation possibility can occur if it is subjected to high temperature and pressures.Įspecially for Oxygen service in Air Separation Unit / Oxygen plants, the best thread sealant is PTFE tape. ![]() PTFE is chemically inert to almost all the chemicals up to the temperature of 230☌ without any physical deformation with the exception of fluorine dry, monoethanol amine and fluorochemicals eg chlorine trifluoride (CIF3). There is also a possibility of analyzer sample contamination in case the thread sealant in the form of paste if applied on the threads is not cured properly. PTFE is good for all instrumentation fittings where the temperature is less than 200 deg C and where the process fluid doesn’t react with PTFE tape. By contrast, true PTFE tape is widely available. ![]() Therefore, strictly speaking, there is no such thing as Teflon™ thread sealing tape sold on today’s market. Teflon™ is a highly specific brand of material that – while chemically and functionally identical to PTFE – is actually no longer manufactured in tape form by the current trademark holder. You may see PTFE plumber’s tape being casually referred to as ‘Teflon™ tape’ in some situations, but this isn’t technically accurate. Many thread sealants are available for use in industrial applications like PTFE tape, PTFE paste, Stag B, Silver Seal, etc. Pressure and temperature of system media,.Compatibility with the wetted materials,.While selecting a thread sealant one must consider following factors: ![]()
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