ASTM E784-89(2022) PDF

Overview

ASTM E784-89(2022), "Standard Specification for Clamps, Utility, Laboratory, and Holders, Buret and Clamp," establishes comprehensive requirements for clamps and clamp holders used to secure laboratory apparatus to support stands. Developed by ASTM International, this specification defines classifications, dimensions, materials, construction, and marking requirements to ensure the consistent performance and reliability of laboratory clamps and holders. Designed for use in laboratories across various industries, these clamps and holders are vital in chemical, educational, research, and testing environments.

Key Topics

• Classification and Types: The standard outlines various types, sizes, and classes of clamps and holders, including:
  • Type I: Clamp holders (fixed, swivel, and all-position jaws)
  • Type II: Two-pronged clamps (fixed, swivel, and duplex)
  • Type III: Extension clamps (two-pronged, three-pronged, and universal)
  • Type IV: Thermometer clamps
  • Type V: Double buret holders
• Materials and Construction:
  • Clamps and holders must be manufactured from aluminum-base alloy, zinc-base alloy, or cast iron.
  • Fittings such as screws and nuts are to be produced from forged aluminum or chemical-resistant alloys.
  • Springs are required to be phosphor bronze or corrosion-resistant steel.
  • Sleeves may be rubber, plastic, fiberglass, mineral, or durable replaceable plastic.
• Dimensions and Tolerances:
  • Clearly defined maximum openings, lengths, and tolerances for all clamp types and sizes.
  • Ensures compatibility with most standard laboratory support rods and apparatus.
• Packaging and Marking:
  • Requirements for packaging levels, labeling, and traceability for civil and military supply chains.
  • Marking standards for shipment and storage to facilitate inventory management and compliance.

Applications

• Research and Academic Laboratories: For securely mounting and positioning test tubes, burets, thermometers, and other apparatus during experiments.
• Industrial Laboratories: Used in chemical, pharmaceutical, and materials testing laboratories for precise and safe holding of equipment and glassware.
• Quality Assurance and Testing: Essential for standardized testing setups, ensuring reproducibility and safety during inspections or testing of materials and chemicals.
• Educational Institutions: Provides students and educators with reliable, safe, and standard-compliant equipment for teaching laboratory techniques.
• Compliance and Procurement: Used as a reference in public and private procurement processes to ensure products meet established safety and durability requirements.

Related Standards

• ASTM A48/A48M: Specification for Gray Iron Castings
• ASTM A276: Specification for Stainless Steel Bars and Shapes
• ASTM B85 and B86: Specifications for Aluminum and Zinc Alloy Castings
• ASTM B139/B139M: Specification for Phosphor Bronze Rod, Bar, and Shapes
• ASTM B247: Specification for Aluminum and Aluminum-Alloy Forgings
• Federal and Military Standards:
  • Fed. Std. No. 123: Marking for Shipment
  • MIL-STD-105: Sampling Procedures and Tables for Inspection
  • MIL-STD-1188: Commercial Packaging of Supplies and Equipment

By adhering to ASTM E784-89(2022), laboratories, manufacturers, and suppliers can ensure the safety, performance, and compatibility of clamps and holders used for fundamental laboratory operations. This helps maintain high standards for laboratory apparatus while supporting universal procurement and compliance practices.