ASTM E1522-93(2003)
(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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Designation: E 1522 – 93(Reapproved 2003)
Standard Specification for
Autoclavable Protective Coatings on Laboratory Glassware
This standard is issued under the fixed designation E 1522; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope zero before removing glassware to minimize the formation of
air pockets under the coating. Also allow coating to clear and
1.1 This specification covers the requirements for autocla-
dry before repeating autoclave cycle. Vacuum drying may
vable protective coatings on laboratory glassware up to and
distort the coating.
including the 4L size. These coatings will not prevent the
escape of liquids from vessels under pressure.
5. Temperature
2. Chemical Resistance 5.1 This coating should not be exposed to dry heat above
110°C or moist heat above 121°C. However, prolonged expo-
2.1 The physical resistance (see 3.1) of the coating shall be
sure to either dry or wet heat will cause discoloration and
acceptable after continuous exposure for one hour to acids,
embrittlement. Discolored coatings may no longer be usable.
(other than chromic), alcohols, bases, aliphatic hydrocarbons
Manufacturers should be consulted for specific applications.
(except as noted below) and oxidizing agents at room tempera-
ture. The intent of the coating is to allow enough time after
6. Microwaving
breakage for proper disposal, not for continued use.
6.1 Containers filled with aqueous solutions and having dry
2.2 The coating shall not be required to withstand exposure
coatings (no obvious moisture under or on them) shall with-
to aldehydes, esters, aromatic hydrocarbons, halogenated hy-
stand microwaving provided that the 110°C temperature limit
drocarbons or ketones.
is not exceeded. Wet coatings may develop steam pockets and
3. Physical Resistance cause the coatings to separate.
6.1.1 Coating life will vary depending on size and configu-
3.1 The thickness and character of the undamaged coating
ration of vessel, temperature achieved and time at such
shall be such that it will not permit the immediate total loss of
temperature.
liquid at 15°C to 70°C from a protected stoppered or capped
6.2 CAUTION: Loosen or remove all caps or closures
container filled to rated capacity when dropped from a height
before microwaving.
of 40 in. onto a floor made of ⁄8 in. maximum vinyl tile over
concrete, but will prevent the escape of glass.
7. Thermal Combustion
4. Autoclavability 7.1 Combustion of various coatings will result in the release
of certain chemicals. Combustion of PVC, for example, will
4.1 The coating shall withstand 15 min autoclave cycl
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