[{"data":1,"prerenderedAt":712},["ShallowReactive",2],{"site-footer-common":3,"glossary:aisi-316-316l-stainless":45,"glossary-related:aisi-316-316l-stainless":205},{"id":4,"extension":5,"footer":6,"meta":40,"navbar":41,"stem":43,"__hash__":44},"common\u002Fcommon.yml","yml",{"tagline":7,"links":8,"sections":9},"Acoustic cleaning intelligence for industrial fouling, soot, ash, dust and build-up.",[],[10,19,31],{"title":11,"links":12},"Product",[13,16],{"label":14,"to":15},"How it works","\u002F#product",{"label":17,"to":18},"Cost assessment","\u002F#hero",{"title":20,"links":21},"Company",[22,25,28],{"label":23,"to":24},"What we build","\u002F#about",{"label":26,"to":27},"Careers","\u002F#careers",{"label":29,"to":30},"Contact","\u002F#contact",{"title":32,"links":33},"Resources",[34,37],{"label":35,"to":36},"Blog","\u002Fresources\u002Fblog",{"label":38,"to":39},"Glossary","\u002Fglossary",{},{"links":42},[],"common","YocmZRy1AYfBbpgGVms-zhdiABlF8VTxHx6h4rDmZBA",{"id":46,"title":47,"aliases":48,"body":53,"category":184,"description":185,"extension":186,"meta":187,"navigation":188,"path":189,"relatedTerms":190,"seo":195,"sources":198,"stem":202,"term":203,"__hash__":204},"glossary\u002Fglossary\u002Faisi-316-316l-stainless.md","AISI 316 \u002F 316L stainless",[49,50,51,52],"316 stainless","316L stainless","SS 316","SS 316L",{"type":54,"value":55,"toc":177},"minimark",[56,79,84,116,120,143,151,155],[57,58,59,63,64,67,68,73,74,78],"p",{},[60,61,62],"strong",{},"AISI 316"," (and the low-carbon variant ",[60,65,66],{},"316L",") is the molybdenum-bearing austenitic stainless steel that serves as the workhorse construction material for industrial ",[69,70,72],"a",{"href":71},"\u002Fglossary\u002Fsonic-horn","sonic horn"," bells, ",[69,75,77],{"href":76},"\u002Fglossary\u002Fdiaphragm-horn","diaphragms"," and mounting flanges in moderate-temperature service.",[80,81,83],"h2",{"id":82},"key-properties","Key properties",[85,86,87,99,105,110],"ul",{},[88,89,90,93,94,98],"li",{},[60,91,92],{},"Molybdenum"," (~2–3%) provides improved corrosion resistance over ",[69,95,97],{"href":96},"\u002Fglossary\u002Faisi-304","AISI 304",", particularly against chloride pitting",[88,100,101,104],{},[60,102,103],{},"Continuous service temperature"," typically up to 870 °C (intermittent), 450–550 °C (continuous mechanical)",[88,106,107,109],{},[60,108,66],{}," has reduced carbon content (≤0.03%) — preferred where welding is involved to avoid carbide precipitation",[88,111,112,115],{},[60,113,114],{},"Cost premium"," of 30–60% over 304, modest in absolute terms for sonic-horn manufacture",[80,117,119],{"id":118},"where-316-is-the-right-choice","Where 316 is the right choice",[85,121,122,134,137,140],{},[88,123,124,125,129,130,133],{},"Cement, ",[69,126,128],{"href":127},"\u002Fglossary\u002Fwaste-to-energy","WtE",", ",[69,131,132],{"href":127},"biomass"," duty — chloride-bearing environments where 304 would pit",[88,135,136],{},"Food-and-beverage process applications",[88,138,139],{},"Cold-end boiler service where mild sulphuric-acid condensation occurs",[88,141,142],{},"General hazardous-area dust-handling applications",[57,144,145,146,150],{},"For higher temperatures or aggressive chloride corrosion, ",[69,147,149],{"href":148},"\u002Fglossary\u002Finconel-625-718","Inconel 625 or 718"," is the next step up.",[80,152,154],{"id":153},"related-terms","Related terms",[85,156,157,161,166,172],{},[88,158,159],{},[69,160,97],{"href":96},[88,162,163],{},[69,164,165],{"href":148},"Inconel 625 \u002F 718",[88,167,168],{},[69,169,171],{"href":170},"\u002Fglossary\u002Fbell-horn","Bell horn",[88,173,174],{},[69,175,176],{"href":76},"Diaphragm horn",{"title":178,"searchDepth":179,"depth":179,"links":180},"",2,[181,182,183],{"id":82,"depth":179,"text":83},{"id":118,"depth":179,"text":119},{"id":153,"depth":179,"text":154},"materials-construction","AISI 316 (and the low-carbon variant 316L) is the molybdenum-bearing austenitic stainless steel that serves as the workhorse construction material for industrial sonic horn bells, diaphragms and mounting flanges in moderate-temperature service.","md",{},true,"\u002Fglossary\u002Faisi-316-316l-stainless",[191,192,193,194],"aisi-304","inconel-625-718","bell-horn","diaphragm-horn",{"title":196,"description":197},"AISI 316 \u002F 316L stainless steel — workhorse material for sonic horn construction","AISI 316 \u002F 316L molybdenum-bearing austenitic stainless steel is the workhorse material for industrial sonic-horn bells, diaphragms and mountings in moderate-temperature service.",[199],{"title":200,"url":201},"Wikipedia — Marine grade stainless","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMarine_grade_stainless","glossary\u002Faisi-316-316l-stainless","AISI 316 and 316L stainless steel","u56u16DGkPcwVS8Crs56ZEC6WpztlyjGjrGuf97rC6w",[206,278,466,608],{"id":207,"title":97,"aliases":208,"body":212,"category":184,"description":264,"extension":186,"meta":265,"navigation":188,"path":96,"relatedTerms":266,"seo":268,"sources":271,"stem":275,"term":276,"__hash__":277},"glossary\u002Fglossary\u002Faisi-304.md",[209,210,211],"304 stainless","SS 304","18-8 stainless",{"type":54,"value":213,"toc":260},[214,223,227,245,248,250],[57,215,216,218,219,222],{},[60,217,97],{}," (sometimes called ",[220,221,211],"em",{}," for its ~18% Cr, ~8% Ni composition) is the most widely-used austenitic stainless steel. In sonic-horn manufacture, 304 is the economy option for external mountings, brackets, accessories and parts that do not see directly corrosive flue-gas chemistry.",[80,224,226],{"id":225},"why-not-304-everywhere","Why not 304 everywhere",[85,228,229,239],{},[88,230,231,234,235,238],{},[60,232,233],{},"Chloride pitting"," — 304 is vulnerable to localised pitting in chloride-bearing environments (most cement, WtE, biomass and coastal applications). ",[69,236,237],{"href":189},"AISI 316 \u002F 316L"," is preferred.",[88,240,241,244],{},[60,242,243],{},"Continuous high temperature"," — 304 begins to scale and lose creep strength above ~500 °C.",[57,246,247],{},"For external accessories — mounting brackets, support frames, weatherproof enclosure panels — 304 is cost-effective without compromising horn performance.",[80,249,154],{"id":153},[85,251,252,256],{},[88,253,254],{},[69,255,47],{"href":189},[88,257,258],{},[69,259,171],{"href":170},{"title":178,"searchDepth":179,"depth":179,"links":261},[262,263],{"id":225,"depth":179,"text":226},{"id":153,"depth":179,"text":154},"AISI 304 (sometimes called 18-8 stainless for its ~18% Cr, ~8% Ni composition) is the most widely-used austenitic stainless steel. In sonic-horn manufacture, 304 is the economy option for external mountings, brackets, accessories and parts that do not see directly corrosive flue-gas chemistry.",{},[267,193],"aisi-316-316l-stainless",{"title":269,"description":270},"AISI 304 stainless steel — economy stainless option for non-corrosive sonic-horn service","AISI 304 (18-8) stainless is the economy stainless option for non-chloride service. Used for sonic-horn external mountings and accessories where 316 would be overspecified.",[272],{"title":273,"url":274},"Wikipedia — SAE 304 stainless steel","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSAE_304_stainless_steel","glossary\u002Faisi-304","AISI 304 stainless steel","mlwsYVbxZf2dCwvZh5lnZvxAF_yZbMfTotEA1QAWKkE",{"id":279,"title":165,"aliases":280,"body":285,"category":184,"description":452,"extension":186,"meta":453,"navigation":188,"path":148,"relatedTerms":454,"seo":456,"sources":459,"stem":463,"term":464,"__hash__":465},"glossary\u002Fglossary\u002Finconel-625-718.md",[281,282,283,284],"Inconel 625","Inconel 718","alloy 625","alloy 718",{"type":54,"value":286,"toc":447},[287,304,308,384,388,425,427],[57,288,289,291,292,294,295,297,298,300,301,303],{},[60,290,281],{}," and ",[60,293,282],{}," are nickel-based superalloys (trademarks of Special Metals Corporation) used for industrial ",[69,296,72],{"href":71}," bells and ",[69,299,77],{"href":76}," in hot-side service above ~500 °C continuous temperature, where ",[69,302,62],{"href":189}," would lose mechanical strength.",[80,305,307],{"id":306},"properties","Properties",[309,310,311,325],"table",{},[312,313,314],"thead",{},[315,316,317,321,323],"tr",{},[318,319,320],"th",{},"Property",[318,322,281],{},[318,324,282],{},[326,327,328,340,351,362,373],"tbody",{},[315,329,330,334,337],{},[331,332,333],"td",{},"Composition",[331,335,336],{},"Ni-Cr-Mo-Nb",[331,338,339],{},"Ni-Cr-Fe with age-hardening",[315,341,342,345,348],{},[331,343,344],{},"Continuous service",[331,346,347],{},"up to ~980 °C",[331,349,350],{},"up to ~700 °C",[315,352,353,356,359],{},[331,354,355],{},"Strength",[331,357,358],{},"High at moderate temp",[331,360,361],{},"Highest at moderate-high temp",[315,363,364,367,370],{},[331,365,366],{},"Cost vs 316",[331,368,369],{},"5–10×",[331,371,372],{},"4–8×",[315,374,375,378,381],{},[331,376,377],{},"Best application",[331,379,380],{},"Sustained high-temp duty",[331,382,383],{},"Strength-critical components",[80,385,387],{"id":386},"where-inconel-is-specified","Where Inconel is specified",[85,389,390,397,404,411,419],{},[88,391,392,396],{},[69,393,395],{"href":394},"\u002Fglossary\u002Fhot-side-esp-cold-side-esp","Hot-side ESP"," penthouses (300–400 °C continuous)",[88,398,399,403],{},[69,400,402],{"href":401},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR reactor"," horn installations (300–400 °C)",[88,405,406,410],{},[69,407,409],{"href":408},"\u002Fglossary\u002Frecovery-boiler","Recovery-boiler"," superheater area",[88,412,413,414,418],{},"Cement ",[69,415,417],{"href":416},"\u002Fglossary\u002Fkiln-inlet-riser-duct","kiln-inlet"," horns",[88,420,421,422,424],{},"Some ",[69,423,128],{"href":127}," high-chloride hot zones",[80,426,154],{"id":153},[85,428,429,433,439,443],{},[88,430,431],{},[69,432,47],{"href":189},[88,434,435],{},[69,436,438],{"href":437},"\u002Fglossary\u002Fhastelloy","Hastelloy",[88,440,441],{},[69,442,171],{"href":170},[88,444,445],{},[69,446,176],{"href":76},{"title":178,"searchDepth":179,"depth":179,"links":448},[449,450,451],{"id":306,"depth":179,"text":307},{"id":386,"depth":179,"text":387},{"id":153,"depth":179,"text":154},"Inconel 625 and Inconel 718 are nickel-based superalloys (trademarks of Special Metals Corporation) used for industrial sonic horn bells and diaphragms in hot-side service above ~500 °C continuous temperature, where AISI 316 would lose mechanical strength.",{},[267,455,193,194],"hastelloy",{"title":457,"description":458},"Inconel 625 and 718 — high-temperature nickel alloys for hot-side sonic horns","Inconel 625 and 718 are nickel-based superalloys used for sonic-horn bells and diaphragms in hot-side service above 500 °C, including SCR reactors and recovery boilers.",[460],{"title":461,"url":462},"Wikipedia — Inconel","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FInconel","glossary\u002Finconel-625-718","Inconel 625 and 718","Ssdz4mZD6ZPUUt3YE6JXlG1foSyU0cQxc63WlTlZQSI",{"id":467,"title":171,"aliases":468,"body":472,"category":589,"description":590,"extension":186,"meta":591,"navigation":188,"path":170,"relatedTerms":592,"seo":596,"sources":599,"stem":606,"term":171,"__hash__":607},"glossary\u002Fglossary\u002Fbell-horn.md",[469,470,471],"bell-shaped horn","exponential bell horn","exponential horn",{"type":54,"value":473,"toc":584},[474,493,497,513,517,560,562],[57,475,476,477,480,481,483,484,487,488,492],{},"A ",[60,478,479],{},"bell horn"," is the conical or exponential flare bolted to the driver of an industrial ",[69,482,72],{"href":71},". Its job is to transform the high-impedance, small-area pressure pulse from the ",[69,485,486],{"href":76},"diaphragm"," or ",[69,489,491],{"href":490},"\u002Fglossary\u002Fpiston-whistle-horn","piston-whistle"," into a lower-impedance, larger-area sound wave that couples efficiently into the gas inside the vessel.",[80,494,496],{"id":495},"why-the-geometry-matters","Why the geometry matters",[57,498,499,500,504,505,487,509,512],{},"The bell is not decorative. Its flare profile — usually exponential, sometimes catenoidal or tractrix — sets the horn's cut-off frequency: below the cut-off, the bell stops behaving as a horn and the radiated sound power collapses. A 60 Hz ",[69,501,503],{"href":502},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner"," therefore needs a physically larger bell than a 230 Hz unit, which is why low-frequency horns are noticeably bulkier and heavier. Mounting orientation, flange standard (",[69,506,508],{"href":507},"\u002Fglossary\u002Fflange-standards-dn-ansi","DN",[69,510,511],{"href":507},"ANSI 150",") and the bell's projection distance into the vessel are all selected to match the cleaning target geometry.",[80,514,516],{"id":515},"materials","Materials",[85,518,519,533,541],{},[88,520,521,524,525,291,529],{},[60,522,523],{},"Carbon steel"," for ambient-temperature mounting on cool-side ducts, ",[69,526,528],{"href":527},"\u002Fglossary\u002Fsilo","silos",[69,530,532],{"href":531},"\u002Fglossary\u002Fhopper","hoppers",[88,534,535,540],{},[60,536,537],{},[69,538,539],{"href":189},"316 stainless steel"," for corrosive or food-grade environments",[88,542,543,547,548,129,551,555,556,559],{},[60,544,545],{},[69,546,149],{"href":148}," for hot-side service above 350 °C, including ",[69,549,550],{"href":401},"SCR reactors",[69,552,554],{"href":553},"\u002Fglossary\u002Fair-heater","air heater"," penthouses and ",[69,557,558],{"href":408},"recovery-boiler"," flue paths",[80,561,154],{"id":153},[85,563,564,569,573,578],{},[88,565,566],{},[69,567,568],{"href":71},"Sonic horn",[88,570,571],{},[69,572,176],{"href":76},[88,574,575],{},[69,576,577],{"href":490},"Piston-whistle horn",[88,579,580],{},[69,581,583],{"href":582},"\u002Fglossary\u002Facoustic-horn","Acoustic horn",{"title":178,"searchDepth":179,"depth":179,"links":585},[586,587,588],{"id":495,"depth":179,"text":496},{"id":515,"depth":179,"text":516},{"id":153,"depth":179,"text":154},"core-technology","A bell horn is the conical or exponential flare bolted to the driver of an industrial sonic horn. Its job is to transform the high-impedance, small-area pressure pulse from the diaphragm or piston-whistle into a lower-impedance, larger-area sound wave that couples efficiently into the gas inside the vessel.",{},[593,194,594,595],"sonic-horn","piston-whistle-horn","acoustic-horn",{"title":597,"description":598},"Bell horn — definition, geometry and role in acoustic cleaning","A bell horn is the conical or exponential flare that amplifies and projects sound from an industrial sonic horn's driver into the vessel being cleaned.",[600,603],{"title":601,"url":602},"Wikipedia — Horn (acoustic)","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHorn_(acoustic)",{"title":604,"url":605},"Power Magazine — The Theory and Application of Acoustic Cleaners","https:\u002F\u002Fwww.powermag.com\u002Fthe-theory-and-application-of-acoustic-cleaners\u002F","glossary\u002Fbell-horn","gKEabZrcxtpNiaEXB65PC50sPq3KHeDc-fyn9OvYp4I",{"id":609,"title":176,"aliases":610,"body":613,"category":589,"description":695,"extension":186,"meta":696,"navigation":188,"path":76,"relatedTerms":697,"seo":700,"sources":703,"stem":710,"term":176,"__hash__":711},"glossary\u002Fglossary\u002Fdiaphragm-horn.md",[611,612],"diaphragm sonic horn","diaphragm-driven horn",{"type":54,"value":614,"toc":689},[615,634,638,646,650,653,657,668,670],[57,616,476,617,620,621,623,624,487,628,630,631,633],{},[60,618,619],{},"diaphragm horn"," is a ",[69,622,72],{"href":71}," in which the cleaning sound is produced by a metal diaphragm vibrating at its design frequency under pulsed compressed-air pressure. The diaphragm — typically ",[69,625,627],{"href":626},"\u002Fglossary\u002Ftitanium-diaphragm","titanium",[69,629,539],{"href":189}," — sits between the air-supply chamber and the throat of the ",[69,632,479],{"href":170}," and is the part most exposed to wear.",[80,635,637],{"id":636},"how-it-generates-sound","How it generates sound",[57,639,640,641,645],{},"Compressed air admitted by a ",[69,642,644],{"href":643},"\u002Fglossary\u002Fsolenoid-valve","solenoid valve"," raises pressure behind the diaphragm. At the design frequency the diaphragm flexes inward, vents the chamber, snaps back under spring tension, re-pressurises and repeats — a self-sustaining oscillation that converts steady air supply into a tonal acoustic output. The bell then amplifies and projects the wave into the vessel.",[80,647,649],{"id":648},"why-it-dominates-the-market","Why it dominates the market",[57,651,652],{},"Most low-to-mid-frequency industrial sonic horns are diaphragm-driven because the design is mechanically simple, tolerates rough industrial air, sustains 140 to 180 dB output without auxiliary power, and the only routine wear part — the diaphragm — is field-replaceable in under an hour. Titanium diaphragms typically last three to five years under normal duty before output drift signals a replacement.",[80,654,656],{"id":655},"diaphragm-horn-vs-piston-whistle-horn","Diaphragm horn vs piston-whistle horn",[57,658,659,662,663,667],{},[69,660,661],{"href":490},"Piston-whistle horns"," use a moving piston-and-whistle assembly rather than a flexing diaphragm. They tend to operate at higher frequencies and shorter dwell times, suit fine dust loads in ",[69,664,666],{"href":665},"\u002Fglossary\u002Ffabric-filter","fabric filters",", and have a different wear profile. Diaphragm horns dominate the 60–250 Hz band; piston-whistle and related designs are more common above 250 Hz.",[80,669,154],{"id":153},[85,671,672,676,680,684],{},[88,673,674],{},[69,675,568],{"href":71},[88,677,678],{},[69,679,171],{"href":170},[88,681,682],{},[69,683,577],{"href":490},[88,685,686],{},[69,687,688],{"href":626},"Titanium diaphragm",{"title":178,"searchDepth":179,"depth":179,"links":690},[691,692,693,694],{"id":636,"depth":179,"text":637},{"id":648,"depth":179,"text":649},{"id":655,"depth":179,"text":656},{"id":153,"depth":179,"text":154},"A diaphragm horn is a sonic horn in which the cleaning sound is produced by a metal diaphragm vibrating at its design frequency under pulsed compressed-air pressure. The diaphragm — typically titanium or 316 stainless steel — sits between the air-supply chamber and the throat of the bell horn and is the part most exposed to wear.",{},[593,193,594,698,699],"titanium-diaphragm","low-frequency-acoustic-cleaner",{"title":701,"description":702},"Diaphragm horn — driver type, materials and typical frequencies","A diaphragm horn is a sonic horn whose sound is generated by a vibrating titanium or stainless-steel diaphragm driven by pulsed compressed air. The dominant form-factor for low-frequency industrial cleaning.",[704,707],{"title":705,"url":706},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":708,"url":709},"Wikipedia — Acoustic cleaning","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAcoustic_cleaning","glossary\u002Fdiaphragm-horn","dtvm3Iiw8hZJrGOuS4cubbp0rZvl9thGaUD53Ulu_k4",1782613746645]