Check Bellow
Date: Sun, 20 Feb 2011 22:17:36 +0300
From: mhaskar.aly@gmail.com
To: materials-welding@googlegroups.com
Subject: [MW:9947] Chemical cleaning of CS internal surfaces of vessels
| Dear Ali
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| ALKEN® LRSD 893 is an effectively inhibited liquid sulfamic-acid cleaner which is formulated to remove deposits in all types of non-potable water systems. ALKEN® LRSD 893 removes deposits of calcium carbonate, and calcium phosphate without attacking the underlying metal surfaces. The acid used in ALKEN® LRSD 893 converts these deposits into water-soluble salts; iron oxide removal is hastened by the ability of the acid to form a stable soluble complex with the iron in the deposits. ALKEN® LRSD 893 incorporates patented inhibition technology for a high degree of electrolytically restrained action to the attack by acids on base steel, while ensuring high efficiency descaling, rinsability and fume reduction. If iron oxides, copper compounds or corrosion are present in the deposit(s), ALKEN® LRSD 890 (liquid inhibited hydrochloric acid cleaner) or ALKEN® DRSD 886 dry inhibited proprietary acid cleaner) may be more effective. If oil and grease deposits are also detected, pre-clean the system with ALKEN® CW 883 for optimum system performance. Consult the Alken-Murray Technical Department for specific product recommendations based upon survey information and chemical analysis of the deposit. |
| Physical State: | Water-thin liquid |
| Color: | Transparent Light Pink |
| pH (11% solution): | 0.37 @ 10.5 degrees C (50.9 degrees F) |
| Odor: | Amine |
| Specific Gravity: | 1.105 @ 20 degrees C (68 degrees F) |
| Freezing Point: | -8 degrees C (17.6 degrees F) |
| Boiling Point: | ~ 102 degrees C (~ 215 degrees F) |
| Viscosity of 11% solution: | 1.48 @ 15 degrees C (59 degrees F) & 0.7 @ 60 degrees C (140 degrees F) |
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| The dosage of ALKEN® LRSD 893 needed to clean a system depends on the size of the system, the type of deposit present, and the total amount (or thickness) of the deposit. Generally, ALKEN® LRSD 893 is used in a twenty percent concentration in water. Heavier deposits may require higher dosage. |
| ALKEN® LRSD 893 is a concentrated liquid acid cleaner/descaler. Store in cool dry place. Store in a tightly closed container. Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with skin, eyes, and clothing. Should contact occur, immediately flush area with large amounts of water. Do not ingest or inhale mists or vapors. Strict adherence to the safety procedures prescribed, especially those in the Material Safety Data Sheet, is necessary in order to handle and use this product safely. DOT Proper Shipping Name: Corrosive Liquid, N.O. S. (Contains Sulfamic acid, solution) Class 8, UN 1760, PG II |
| Viscosity was tested using a Cannon® Rotational Viscometer, model LV-2000, a low viscosity attachment, a Cannon® water jacket and #4 spindle with temperature controlled by a Haake® constant temperature water bath, model F3-K. A correction factor of 1.11 was applied after calibrating with Cannon® Viscosity Standards. | ||
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| ALKEN® LRSD 893 is is generally packaged in 55-gallon polyethylene drums which conform to Performance Oriented Packaging Specifications. Product can be packaged in 5 gallon pails if a minimum order of 10 pails is placed at one time. Update; 03-09-2007 |
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Thank you for reading my question & answering the same.
We have one vessel having heavy rust on internal surfaces. The vessel is mounted on skid & Blast cleaning is not possible.
Can anybody suggest what chemical can be used for
- Cleaning.
- Passivation after cleaning
- For inhibitor .
Thank you in advance
Aly
Kuwait
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