Acid Proofing / Acid Proof Bricks

Class I Acid Proof Bricks

Class I is a grade in Shanker Agencies’ acid proof bricks range.

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Grade

Class I

Cold crushing strength

40 MPa

Class I technical specification

Typical values for Class I acid proof bricks. Test methods vary by property and product family, so confirm the applicable standard against the manufacturer datasheet before specifying.

Water absorption

3-6%

Acid resistance

97% min

Alkali resistance

75%

Cold crushing strength

40 MPa

Size

230×113×65mm std

Where Class I is used

Acid storage tank lining (H₂SO₄, HNO₃, HCl, H₃PO₄)Reaction vessel and reactor liningAbsorption tower internal liningChimney and flue gas duct liningEffluent treatment plant sumps and channelsFertiliser plant, sulphuric acid plantPickling tank lining (steel processing)Battery room floors

Compare Class I with other grades▾

Compare Class I against every grade SAPL stocks in this family.

Swipe to compare grades

Grade	Water absorption	Acid resistance	Alkali resistance	Cold crushing strength	Size
Class Ithis grade	3-6%	97% min	75%	40 MPa	230×113×65mm std
Class II	<2%	99% min	85%	50 MPa	230×113×65mm std
Class III	<0.5%	99.5% min	90%	55 MPa	Custom
Carbon-Fill	<1%	99.5% min	95%	45 MPa	Standard + custom
Anti-static	<2%	99% min	85%	45 MPa	230×113×65mm std

Class II →

Send the drawing, dimensions, application and quantity for Class I acid proof bricks. Our technical team reviews the requirement and advises on grade and fulfilment route.

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Installation notes

1Surface preparation: concrete or steel substrate must be clean, dry, and free of oil/grease
2Apply primer coat, epoxy primer for steel, concrete primer for concrete substrate
3Use appropriate acid-resistant cement: furan resin (best acid resistance), phenolic resin, or potassium silicate
4Bed mortar thickness: 3–6 mm, applied to both brick and substrate (buttered joint)
5Joint width: 3–6 mm, fully filled with acid-resistant mortar
6Curing: furan resin mortars, 24 hrs at 25°C before any chemical exposure; heat curing improves performance
7Test before commissioning: hydraulic leak test or chemical spot test

Disclaimer: values are typical and compiled by Shanker Agencies Pvt. Ltd. from standard industry data and published manufacturer specifications. They are indicative, not a guarantee. Confirm the exact grade datasheet before specifying. For a certified datasheet or quotation, contact info@shankeragencies.com or +91 98999 57888.