American Sensor Technologies, Inc. (AST) manufactures pressure transducers using Hastelloy* C276 material for use with corrosive liquids and gases. Using both Krystal Bond Technology and LP Technology, AST has a full range of capability from 2.5 PSI up to 10,000 PSI. The material is a perfect compliment to stainless steel by offering a high yield strength and superior corrosion resistance.
With Krystal Bond Technology, customers receive a monolithic piece of material with no welds, O-rings, or fluid fills. Bulk silicon strain gages are mounted directly to the top of the metal diaphragm using a special glass firing process. With high raw output signal, inorganic materials, and a thick diaphragm membrane, users benefit from complete isolation of the pressure to the fitting and long-term stability.
With the increased use and development of specialty liquids and gases, special attention is being given to the materials used in contact with them. As such, increased awareness and regulations aide in this process to ensure safety of those individuals around them.
AST pressure transducers are being used in hazardous and non-hazardous locations to monitor the level and/or pressure of such chemicals using Hastelloy C276 (N10276) material. In the oil production and process industries, NACE MR0175/ISO 15156 and NACE MR0103 allow for the use of Hastelloy C276 with liquids and gases that come in contact with materials that can cause sulfide stress cracking (SSC) or stress cracking corrosion (SCC). Canadian regulations for piping and fittings in upstream and midstream piping requires provinical registration (Canadian Registration Number - CRN) of sensor fittings and materials under ASME B31.3.
Offering Hastelloy material compliments AST’s other materials that are limited in this environment (316L) or not allowed (17-4 PH). With the presence of hydrogen sulfide and chlorides in many chemical processes, nickel alloys offer higher survivability than standard stainless steels. Combined with AST’s sensor technology, the material, diaphragm thickness and low operating strain combine to create an ideal match for long term pressure measurement.
*Hastelloy is a registered trademark of Haynes International