SIST EN 2837:2012

Overview

SIST EN 2837:2012 is a European standard developed by the European Committee for Standardization (CEN) that specifies the properties and requirements for chloroprene rubber (CR) used in aerospace applications. This standard focuses on a specific type of CR characterized by heat resistance and a hardness of 60 IRHD (International Rubber Hardness Degree). The standard ensures that materials comply with stringent aerospace industry needs, particularly regarding durability under heat exposure, resistance to environmental factors, and physical performance criteria.

Key Topics

• Material Specification: Defines chloroprene rubber (CR) with a hardness of 60 IRHD, optimized for aerospace use.
• Heat Resistance: Designed to withstand continuous service temperatures from −40 °C to 120 °C, with intermittent exposure possible up to 150 °C.
• Physical Properties: Standardized testing methods specify minimum tensile strength, elongation at break, tear strength, density, and resistance to low temperatures.
• Environmental Resistance: Includes ozone resistance and corrosion and adhesion testing on metals to ensure long-term reliability in harsh aerospace environments.
• Batch Acceptance: Specifies which tests must be performed for manufacturing batch approval, including hardness, density, tensile strength, elongation at break, and compression set.
• Testing Standards: Incorporates references to EN 3207 (rubber compounds technical specification) and ISO 1817 (determination of the effect of liquids on vulcanized rubber).

Applications

SIST EN 2837:2012 is used primarily in the aerospace industry where materials demand:

• High heat resistance: Suitable for components exposed to elevated temperatures such as seals, gaskets, hoses, and vibration isolators.
• Resistance to atmospheric ageing: Maintains material integrity despite exposure to ozone and environmental degradation.
• Chemical resistance: Moderate tolerance to petroleum-based fuels and lubricants makes it suitable for aerospace fuel systems and engine parts.
• Mechanical durability: Robust tensile strength and elongation properties ensure reliability and safety in critical aerospace functions.
• Long service life: Compression set specifications guarantee performance retention after prolonged exposure to operational stresses and heat.

Manufacturers and engineers in aerospace materials research, component manufacturing, and quality assurance use EN 2837 to select and qualify heat-resistant chloroprene rubber products.

Related Standards

• EN 3207: Aerospace series - Rubber compounds - Technical specification
  Provides detailed technical requirements and testing procedures for rubber materials used in aerospace applications. EN 2837 refers to EN 3207 for comprehensive test methodology and quality control.

• ISO 1817: Rubber, vulcanized or thermoplastic - Determination of the effect of liquids
  Specifies test conditions for assessing the impact of various liquids on rubber materials, essential for evaluating chemical resistance as outlined in EN 2837.

• ISO 1629: Rubber and latices - Nomenclature
  Defines standard terminology and classification symbols for rubber types, including chloroprene rubber (CR), which is identified in EN 2837.

This standard supports aerospace industry professionals in ensuring compliance with material performance needs for safety and reliability when employing heat-resistant chloroprene rubber with 60 IRHD hardness. Incorporating SIST EN 2837:2012 into the design and procurement process promotes quality assurance across international aerospace supply chains.