ASTM E1522-93(2019)
(Specification)Standard Specification for Autoclavable Protective Coatings on Laboratory Glassware
Standard Specification for Autoclavable Protective Coatings on Laboratory Glassware
ABSTRACT
This specification covers the requirements for autoclavable protective coatings on laboratory glassware. These coatings will not prevent the escape of liquids from vessels under pressure. Materials shall be tested and shall conform to requirements for physical and chemical resistance, autoclavability, temperature, microwaving, thermal combustion, flammability, and color.
SCOPE
1.1 This specification covers the requirements for autoclavable protective coatings on laboratory glassware up to and including the 4L size. These coatings will not prevent the escape of liquids from vessels under pressure.
1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E1522 −93 (Reapproved 2019)
Standard Specification for
Autoclavable Protective Coatings on Laboratory Glassware
This standard is issued under the fixed designation E1522; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope coating during autoclaving and cause a slight clouding, but this
clouding must be removable by oven drying at not over 110 °C.
1.1 This specification covers the requirements for autocla-
Drying time will vary depending on size and configuration of
vable protective coatings on laboratory glassware up to and
vessel.
including the 4L size. These coatings will not prevent the
escape of liquids from vessels under pressure. 4.1.1 Coating life will vary depending on size and configu-
ration of vessel and size and procedure of autoclave used.Also
1.2 This international standard was developed in accor-
allow coating to clear and dry before repeating autoclave cycle.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.2 CAUTION: Loosen or remove all caps or closures
Development of International Standards, Guides and Recom-
before autoclaving and allow autoclave pressure to return to
mendations issued by the World Trade Organization Technical
zero before removing glassware to minimize the formation of
Barriers to Trade (TBT) Committee.
air pockets under the coating. Also allow coating to clear and
dry before repeating autoclave cycle. Vacuum drying may
2. Chemical Resistance
distort the coating.
2.1 The physical resistance (see 3.1) of the coating shall be
acceptable after continuous exposure for one hour to acids,
5. Temperature
(other than chromic), alcohols, bases, aliphatic hydrocarbons
5.1 This coating should not be exposed to dry heat above
(except as noted below), and oxidizing agents at room tem-
perature. The intent of the coating is to allow enough time after 110 °C or moist heat above 121 °C. However, prolonged
breakage for proper disposal, not for continued use. exposure to either dry or wet heat will cause discoloration and
embrittlement. Discolored coatings may no longer be usable.
2.2 The coating shall not be required to withstand exposure
Manufacturers should be consulted for specific applications.
to aldehydes, esters, aromatic hydrocarbons, halogenated
hydrocarbons, or ketones.
6. Microwaving
3. Physical Resistance
6.1 Containers filled with aqueous solutions and having dry
3.1 The thickness and character of the undamaged coating
coatings (no obvious moisture under or on them) shall with-
shall be such that it will not permit the immediate total loss of
stand microwaving provided that the 110 °C temperature limit
liquid at 15 °C to 70 °C from a protected stoppered or capped
is not exceeded. Wet coatings may develop steam pockets and
container filled to rated capacity when
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