ASTM E585/E585M-23 PDF

Overview

ASTM E585/E585M-23 is the international standard specification for compacted mineral-insulated, metal-sheathed (MIMS) base metal thermocouple cable, issued by ASTM International. This standard defines essential requirements for the materials, processing, testing, and quality assurance of MIMS thermocouple cable, which incorporates a sheath of corrosion-resistant metal, base metal thermoelements, and mineral insulation (magnesia or alumina). It applies to cable with at least two thermoelements, providing detailed guidance to ensure cable performance in demanding industrial temperature measurement applications.

Key Topics

• Material Requirements: Specifies the use of solid wire thermoelements (Types E, J, K, N, or T), austenitic stainless steel, or nickel-chrome alloy sheath, and magnesia (MgO) or alumina (Al2O3) insulation.
• Dimensional Standards: Establishes minimum sheath wall thickness, thermoelement and insulation diameters as a percentage of cable diameter, ensuring reliability and safety.
• Testing Protocols: Mandates room temperature insulation resistance, calibration against specified tolerances, electrical continuity, insulation density, and sheath integrity tests.
• Supplementary Options: Offers guidance on optional elevated temperature tests, surface finish requirements, dielectric breakdown tests, and quality program verifications to address diverse operational conditions.
• Identification & Traceability: Requires thorough documentation and product labeling for traceability from raw material to finished cable.
• Packaging & Shipping: Details sealing, cleanliness, packaging, and marking requirements to maintain cable integrity throughout handling and delivery.

Applications

ASTM E585/E585M-23 covers mineral-insulated thermocouple cable widely used in:

• Industrial Process Control: Reliable measurement in harsh or corrosive environments, such as chemical plants, power generation, metal processing, and pharmaceuticals.
• Manufacturing Thermocouples: Serves as primary sheathed cable for fabrication of sensors conforming to high temperature and precision measurement requirements.
• Critical Installations: Suitable for use in locations demanding high mechanical strength, excellent insulation, and protection against moisture and contaminants.
• Extension Cables: Functions as extension wire where environmental protection is paramount.

Key advantages derived from compliance include enhanced cable durability, stable insulation resistance, and assured measurement accuracy over the cable's service life.

Related Standards

ASTM E585/E585M-23 references multiple related standards to ensure comprehensive performance and material requirements. Key related documents include:

• ASTM A213/A213M: Seamless alloy-steel tube specifications for sheaths
• ASTM E230/E230M: Temperature-electromotive force (emf) tables for standardized thermocouples
• ASTM E608/E608M: Specifications for mineral-insulated, metal-sheathed thermocouples
• ASTM E839: Test methods for sheathed thermocouples and cables
• ASTM E1652: Requirements for magnesium oxide and aluminum oxide insulators
• ASTM A632, B163, B167, B423, B516: Sheath and insulation material specifications
• ANSI B46.1: Surface texture standards

Adherence to ASTM E585/E585M-23 ensures compatibility and performance in line with international best practices for temperature measurement instrumentation.

Keywords: ASTM E585/E585M-23, mineral-insulated thermocouple cable, MIMS cable, temperature measurement, base metal thermocouple, insulation resistance, sheath integrity, industrial process control, calibration, ASTM standards.