ASTM E1522-93(2013)
(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.
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Standards Content (Sample)
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Designation:E1522 −93 (Reapproved 2013)
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 4.2 CAUTION: Loosen or remove all caps or closures
before autoclaving and allow autoclave pressure to return to
1.1 This specification covers the requirements for autocla-
zero before removing glassware to minimize the formation of
vable protective coatings on laboratory glassware up to and
air pockets under the coating. Also allow coating to clear and
including the 4L size. These coatings will not prevent the
dry before repeating autoclave cycle. Vacuum drying may
escape of liquids from vessels under pressure.
distort the coating.
2. Chemical Resistance
5. Temperature
2.1 The physical resistance (see 3.1) of the coating shall be
5.1 This coating should not be exposed to dry heat above
acceptable after continuous exposure for one hour to acids,
(other than chromic), alcohols, bases, aliphatic hydrocarbons 110°C or moist heat above 121°C. However, prolonged expo-
sure to either dry or wet heat will cause discoloration and
(except as noted below) and oxidizing agents at room tempera-
ture. The intent of the coating is to allow enough time after embrittlement. Discolored coatings may no longer be usable.
Manufacturers should be consulted for specific applications.
breakage for proper disposal, not for continued use.
2.2 The coating shall not be required to withstand exposure
6. Microwaving
to aldehydes, esters, aromatic hydrocarbons, halogenated hy-
drocarbons or ketones. 6.1 Containers filled with aqueous solutions and having dry
coatings (no obvious moisture under or on them) shall with-
3. Physical Resistance
stand microwaving provided that the 110°C temperature limit
3.1 The thickness and character of the undamaged coating is not exceeded. Wet coatings may develop steam pockets and
cause the coatings to separate.
shall be such that it will not permit the immediate total loss of
6.1.1 Coating life will vary depending on size and configu-
liquid at 15°C to 70°C from a protected stoppered or capped
ration of vessel, temperature achieved and time at such
container filled to rated capacity when dropped from a height
temperature.
of 40 in. onto a floor made of ⁄8 in. maximum vinyl tile over
concrete, but will prevent the escape of glass.
6.2 CAUTION: Loosen or remove all caps or closures
before microwaving.
4. Autoclavability
4.1 The coating shall withstand 15 min autoclave cycles at
7. Thermal Combustion
121°C and 15 psig, although some air pockets under the
7.1 Combustion of various coatings will result in the releas
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