ASTM E2821-20
Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers

Standard No.

ASTM E2821-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E2821-20

Scope

1.1 This specification covers the requirements for compacted, mineral-insulated, metal-sheathed (MIMS) cables used to manufacture metal-sheathed, industrial resistance thermometers referred to in this document as Resistance Temperature Detectors or RTDs. 1.2 The materials of construction include copper, nickelclad copper, copper-45 % nickel (constantan), or nickel conductors, an austenitic stainless steel or nickel-chromium alloy sheath, and either magnesia (MgO) or alumina (Al2O3) insulation. 1.3 The cable diameter is between 0.093 and 0.500 in. (2.33 and 12.70 mm) and contains between two and eight conductors, set in various design configurations and wire spacings. 1.4 The values of temperature in this specification are based on the International Temperature Scale of 1990 (ITS-90). 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 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. 1.7 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.

ASTM E2821-20 Referenced Document

• ASTM A213/A213M Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
• ASTM A249/A249M Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
• ASTM A632 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
• ASTM E112 Standard Test Methods for Determining Average Grain Size
• ASTM E1137/E1137M Standard Specification for Industrial Platinum Resistance Thermometers
• ASTM E1652 Standard Specification for Magnesium Oxide and Aluminum Oxide Powder and Crushable Insulators Used in the Manufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and*， 2021-11-01 Update
• ASTM E344 Terminology Relating to Thermometry and Hydrometry*， 2023-12-01 Update
• ASTM E780 Standard Test Method for Measuring the Insulation Resistance of Sheathed Thermocouple Material at Room Temperature
• ASTM E839 Standard Test Methods for Sheathed Thermocouples and Sheathed Thermocouple Material

ASTM E2821-20 history

• 2020 ASTM E2821-20 Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers
• 2013 ASTM E2821-13 Standard Specification for ?Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers