Loading arms are critical equipment at loading and unloading stations for rail cars, road tankers, and ships. Their proper selection is fundamental for safety, efficiency, and ergonomics of transfer operations. What factors should be given special attention?

Key Technical Parameters

Selection of loading arms begins with analysis of basic technical parameters of the installation:

Flow Rate

The loading arm's capacity must match the required transfer efficiency. Typical values range from 50 m³/h for small installations to 2000 m³/h for large fuel terminals. The nominal diameter of the arm (DN50-DN400) is directly related to maximum capacity.

Operating reach

Arm reach must correspond to distance between mounting point and vehicle tank. Standard arms offer 3-7 meter reach.

Construction material

Material selection depends on transferred medium type. Carbon steel for petroleum products, stainless steel for aggressive chemicals, aluminum for food products.

Safety systems

Modern loading arms are equipped with advanced safety systems:

  • Breakaway Couplings Breakaway couplings automatically disconnect the arm in case of vehicle departure, preventing damage.
  • PERC System Powered Emergency Release Coupler - powered emergency release coupling with automatic valve closure.
  • VRU Systems Vapor Recovery Unit - vapor recovery during loading, 99% emission reduction.
  • Position locks Lock systems preventing improper arm connection or disconnection.

Industry applications

Loading arms find application in various industrial sectors:

  • Fuel industry - gasoline, diesel, LPG transfer
  • Chemical industry - acids, bases, solvents
  • Food industry - edible oils, milk, juices
  • Pharmaceutical industry - active substances, high-purity solvents

Arm selection checklist

Technical parameters
  • Medium type and properties
  • Required flow rate
  • Operating pressure and temperature
Operational requirements
  • Loading frequency
  • Vehicle type (tank truck, rail car)
  • Safety and environmental requirements

Maintenance and service

Regular maintenance ensures long life and safe operation:

  • Swivel joint inspection every 6 months
  • Seal replacement per manufacturer recommendations
  • Measuring system calibration annually
  • Safety system testing quarterly

Summary

Proper loading arm selection is key to safe and efficient transfer operations. Technical parameters, safety requirements, and industry specifics must be considered.

Techcom Serwis offers comprehensive consulting in selection, supply, and installation of loading arms from leading global manufacturers.

Need professional consulting? View our products or contact an expert