ASTM C375-22

Standard Classification of Water Used in Milling of Porcelain Enamel

ABSTRACT
This classification covers water used in the milling of porcelain enamel frit. Three classes of water are covered: For porcelain enamel frits, Class A water should cause no difficulties in the production of a high quality finish. Class B water may be used by slight compensations in processing. Mill addition water falling into Class C should be treated before use in order to preclude faulty enamel production. For analysis, the following elements and properties shall be determined: sampling, bicarbonate, calcium & magnesium, chloride, hardness, iron, manganese, pH, sulfate, and total solids.
SCOPE
1.1 This classification covers water used in the milling of porcelain enamel frit.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 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

• Status: Published
• Publication Date: 30-Apr-2022
• ICS: 25.220.50 - Enamels
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems

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:C375 −22
Standard Classification of
1
Water Used in Milling of Porcelain Enamel
This standard is issued under the fixed designation C375; 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.
INTRODUCTION
This standard sets forth Class A, B, and C categories for water used for milling porcelain enamel
based on the concentrations of allowable contaminates and the quality requirements of the fired finish.
1. Scope D513 Test Methods for Total and Dissolved Carbon Dioxide
in Water
1.1 This classification covers water used in the milling of
D516 Test Method for Sulfate Ion in Water
porcelain enamel frit.
D858 Test Methods for Manganese in Water
1.2 This standard does not purport to address all of the
D1068 Test Methods for Iron in Water
safety concerns, if any, associated with its use. It is the
D1126 Test Method for Hardness in Water
responsibility of the user of this standard to establish appro-
D1293 Test Methods for pH of Water
priate safety, health, and environmental practices and deter-
D3370 Practices for Sampling Water from Flowing Process
mine the applicability of regulatory limitations prior to use.
Streams
1.3 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Classification
ization established in the Decision on Principles for the
3.1 Three classes of water are covered, based on the
Development of International Standards, Guides and Recom-
maximum impurity analyses as defined in Table 1. For porce-
mendations issued by the World Trade Organization Technical
lain enamel frits, Class A water should cause no difficulties in
Barriers to Trade (TBT) Committee.
the production of a high quality finish. Class B water may be
2. Referenced Documents used by slight compensations in processing. Mill addition
2
water falling into Class C should be treated before use in order
2.1 ASTM Standards:
to preclude faulty enamel production.
D511 Test Methods for Calcium and Magnesium In Water
D512 Test Methods for Chloride Ion In Water (Withdrawn
3 4. Methods of Analysis
2021)
4.1 Determine the elements and properties listed in Table 1
in accordance with the following ASTM methods:
1
This classification is under the jurisdiction of ASTM Committee B08 on
4.1.1 Sampling—Practice D3370.
Metallic and Inorganic Coatings and is the direc
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C375 − 58 (Reapproved 2016) C375 − 22
Standard Classification of
1
Water Used in Milling of Porcelain Enamel
This standard is issued under the fixed designation C375; 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.
INTRODUCTION
This standard sets forth Class A, B, and C categories for water used for milling porcelain enamel
based on the concentrations of allowable contaminates and the quality requirements of the fired finish.
1. Scope
1.1 This classification covers water used in the milling of porcelain enamel frit.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D511 Test Methods for Calcium and Magnesium In Water
3
D512 Test Methods for Chloride Ion In Water (Withdrawn 2021)
D513 Test Methods for Total and Dissolved Carbon Dioxide in Water
D516 Test Method for Sulfate Ion in Water
D858 Test Methods for Manganese in Water
D1068 Test Methods for Iron in Water
D1126 Test Method for Hardness in Water
D1293 Test Methods for pH of Water
3
D1888 Methods Of Test for Particulate and Dissolved Matter in Water (Withdrawn 1989)
D3370 Practices for Sampling Water from Flowing Process Streams
3. Classification
3.1 Three classes of water are covered, based on the maximum impurity analyses as defined in Table 1. For porcelain enamel frits,
1
This classification is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
Materials for Porcelain Enamel and Ceramic-Metal Systems.
Current edition approved Nov. 1, 2016May 1, 2022. Published November 2016May 2022. Originally approved in 1955. Last previous edition approved in 20112016 as
C375 – 58 (2011).(2016). DOI: 10.1520/C0375-58R16. 10.1520/C0375-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document
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