Call for Consensus Body Voting Members: ANS CGA H-5, Installation Standards for Bulk Hydrogen Supply Systems

April 8, 2019

Overview

The Compressed Gas Association (CGA) is working to complete the formation of the consensus body for the proposed American National Standard (ANS) CGA H-5, Installation Standards for Bulk Hydrogen Supply Systems. The purpose of this standard is to provide requirements for locating/siting, selecting equipment, installing, starting up, maintaining, and removing bulk hydrogen supply systems.

This standard contains minimum requirements for locating/siting, selecting equipment, installing, starting up, maintaining, and removing bulk hydrogen supply systems.

Two types of bulk hydrogen supply systems are covered in this standard: liquid and gaseous.

A bulk gas hydrogen supply system is one that contains more than 5000 scf (141.6 m3) of hydrogen. A bulk liquid supply system is one that contains more than 39.7 gal (150 L) of hydrogen. Requirements of this standard are limited to systems operating up to 15 000 psi (103.4 MPa).

Definitions

For the purpose of this standard, a liquid system is defined as one where hydrogen is delivered to the supply system and stored on-site in liquid form. Hydrogen is supplied in either liquid or gaseous form to the end user’s requirement. When required, pumps and/or compressors are used to increase the hydrogen pressure before it is supplied to the end user. When required, coded vessels are used to store gaseous hydrogen before it is supplied to the end user. The system is considered to be a bulk liquid system instead of a bulk gaseous system because the hydrogen is delivered from the hydrogen supplier to the storage system in liquid form.

For the purpose of this standard, a gas system is defined as one where hydrogen is delivered to the supply system, stored, and is supplied to the end user’s requirement in gaseous form.

Types of Hydrogen Supply Systems Covered Under This Standard

This standard applies to hydrogen supply systems containing any of the following equipment. Not all hydrogen systems include all the equipment listed. More details about hydrogen applications can be found in CGA G-5, Hydrogen and CGA’s Handbook of Compressed Gases.

Hydrogen supply systems include:

  • cryogenic hydrogen storage tank, either aboveground or belowground;
  • gas storage vessels, either aboveground or belowground;
  • heat exchangers (including vaporizers);
  • valves including manual and automatic shutoff valves, and check valves;
  • pressure control equipment including regulators and control valves;
  • piping (pipe and tubing);
  • cryogenic pumps;
  • cryogenic and warm gas compressors;
  • snubbers and pulsation dampeners; and
  • monitoring and control systems including electrical and instrumentation.

The bulk hydrogen supply system terminates at the source valve or where the gas or liquid hydrogen supply first enters the supply line.

How to Apply for the Consensus Body

Currently, this ANS consensus body needs 3 voting members from the following membership categories in order to be able to proceed with this publication:

  • User (Industrial customers and others who use hydrogen in its varied applications);
  • General Interest (DOE, universities, national laboratories);
  • Other (Standards development organizations such as NFPA and ICC).

If you have participated on this consensus body in the past, your membership does not carry over and you need to join the consensus body for this revision.

Please note that membership in CGA is not a requirement to join this ANS consensus body. Currently, there is no fee to join this ANS consensus body.

To ensure that the ANS consensus body interest categories remain in balance, voting privileges are assigned on a first-come, first-served basis to each eligible member who submits an ANS consensus body member application until a balanced consensus body is established. No new voting members will be added after the proposed change cutoff date has passed unless the ANS consensus body becomes unbalanced. If there are more applications for voting privileges than available positions, CGA will maintain a waiting list of potential voting members to be added if the ANS consensus body becomes unbalanced.

If you are interested in participating on this ANS consensus body as a voting member, please send an email to tdeary@cganet.com no later than 10 April 2019.