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Acid Leak Detection (ALD) Assembly

Acid Leak Detection (ALD) Assembly
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Brochure C ASHCROFT' Trust the shield.® AT ASHCROFT, WE UNDERSTAND THE DANGERS OF ACID LEAKS. That is why we have developed the Acid Leak Detection (ALD) assembly. ALD is a special yellow coating that changes to red once it is exposed to acids with a pH of < 3.0, providing visual indication of a leak of process media. For years, our CASE™ team has helped customers troubleshoot critical applications such as HF Alky. While dangerous acids have been safely used in industrial applications for many years, specifying proper pressure instrumentation for these locations requires unique expertise. HF Alky Case Study Products: Media corroding Monel gauge system Failure Mode: HF Alky (hydrofluoric acid) Operating Pressure: 60, 100, 300 & 600 psi The Problem: Hydrogen Flouride (HF) is used as a catalyst in the alkylation process - taking short chain olefins (propylene/buylene) and combining with isobutane (all gasses) into larger molecules suitable for motor fuels. This “Alkylate” is used as a blending stock for high octane gasolines. When released in the atmosphere, HF rapidly forms dense vapor clouds that can cause severe burns and injuries to eyes, nose, throat and respiratory system. Therefore, process containment is vital. While Monel offers acceptable resistance to HF, the gauge alone provides only single containment of the process media. Several refineries have contacted our CASE™ team to mitigate this issue. In our most recent case study, we have helped a refinery identify a double containment solution. The Solutions: The CASE™ team specified a 510 Monel® diaphragm seal welded to a Duragauge® Pressure Gauge. The assembly was heat treated to reduce the risk of stress corrosion cracking in HF Alky. A diaphragm seal also provides double containment. To visually differentiate these assemblies, the gauge dials were marked “For use on HF Alky Only”. Additionally, to provide further protection to plant operators, the ALD assembly was recommended. The diaphragm seal is coated with a yellow acid detection paint. If acid should escape from the seal, it will turn red. The lower portion of the gauge is also coated with ALD to indicate any leakage in the bourdon tube or welded joints of the gauge system. WITH YEARS OF EXPERIENCE, OUR DEDICATED ENGINEERS AND IN-HOUSE METALLURGIST CAN HELP YOU FIND THE BEST INSTRUMENTATION FOR YOUR MOST CHALLENGING APPLICATIONS. CONTACT OUR CASE™ TEAM AT CASE@ASHCROFT.COM OR CALL US AT 203-385-0635 ashcroft.com info@ashcroft.com 1.800.385-0635 All specifications are subject to change without notice. All sales subject to standard terms and conditions. ©2018 Ashcroft Inc. ald1_br1, 04/18

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Brochure CASHCROFT Trust the shield.® Acid Leak Detection (ALD) Assembly FEATURES ■ Acid sensing component (yellow in photo turns red when exposed to acid with a pH < 3) ■ Dual containment for safety ■ Available with pressure ranges to 10,000 psi ■ Gauge welded to seal standard ■ Available with Halocarbon® fill for oxidizing acids ■ Optional orange or yellow gauge case for indentification ■ Available with Silicone-free PLUS!™ Performance ■ Custom dials available Accuracy: ±1.0% of span (1259, 1279) or ±1.5% of span (T6500) Process Connection Size: 12 NPT Case Style: Solid front with...

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CASHCROFT Trust the shield.® Acid Leak Detection (ALD) Assembly ORDERING CODE Dial Size 45 - 41/2” Dial (available only with cases 1 and 2) 45 10 - 100mm Dial (available only with case 3) Case 1 - 1279 (available only with dial size 45) 2 - 1259 (available only with dial size 45) 3 - T6500 (available only with dial size 100mm) Bourdon Tube & Gauge Process Connection S - 316 SS P- Monel® Diaphram Seal and Material 1P (510) - Monel® (available only with (P-Monel®) lower housing) 1H (510) - Hastelloy® C-276 2S (DF) - 316L SS 2P (DF) - Monel® 2H (DF) - Hastelloy® C-276 2U (DF) - Tantalum Lower...

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