ANSI CGA H-5-2014 PDF

Full title and description

ANSI/CGA H-5-2014 — Standard for Bulk Hydrogen Supply Systems (Second Edition). This American National Standard provides recommended minimum installation, siting, equipment-selection, start-up, operation, maintenance, and removal practices for bulk hydrogen supply systems (both liquid and gaseous) and applies to systems operating up to 15,000 psi.

Abstract

Includes minimum requirements for locating/siting, selecting equipment, installing, starting up, maintaining, and removing bulk hydrogen supply systems. The standard addresses both bulk gaseous systems (greater than 5,000 scf / 141.6 m3) and bulk liquid systems (greater than 39.7 gal / 150 L), and describes typical equipment (storage tanks, vessels, vaporizers/heat exchangers, pumps/compressors, valves, piping, pressure‑control equipment, instrumentation and controls) and informative system flow diagrams.

General information

• Status: Superseded (historical/second edition; replaced by CGA H-5:2020).
• Publication date: Published as the 2014 (Second) edition — originally issued by the publisher in late 2013 (publisher listing: 01‑12‑2013) and published as CGA H-5‑2014.
• Publisher: Compressed Gas Association (CGA); ANSI‑approved American National Standard listing available from the ANSI/Standards store.
• ICS / categories: Energy systems / hydrogen technology; storage and distribution of gases; industrial gas safety (hydrogen supply systems, cryogenic and high‑pressure gas infrastructure).
• Edition / version: Second edition (designated “CGA H-5‑2014”); later revised by CGA H-5:2020.
• Number of pages: Publisher PDF lengths vary by listing (publisher/retailer listings show typical full‑standard lengths in the mid‑30s to mid‑40s pages depending on PDF formatting and edition). See publisher for the definitive PDF page count.

Scope

This standard provides suggested minimum installation standards for bulk hydrogen supply systems — both liquid and gaseous — intended for commercial and industrial facilities. It applies to systems containing more than 5,000 scf (approx. 141.6 m3) for gaseous bulk systems or more than 39.7 gallons (approx. 150 L) for bulk liquid systems, and to equipment and systems operating up to 15,000 psi (103.4 MPa). The scope covers site selection, equipment selection, regulatory compliance, equipment transport and setting, installation, start‑up, operation, maintenance, and system removal; appendices include typical gas and liquid flow diagrams.

Key topics and requirements

• Definitions and classification of bulk hydrogen systems (liquid vs gaseous) and thresholds for “bulk” quantity.
• Site selection and development criteria (setbacks, ventilation, foundation and containment considerations, aboveground vs belowground storage).
• Equipment selection and specifications (storage tanks, pressure vessels, vaporizers, pumps, compressors, pressure‑control devices, valves, piping and fittings).
• Transportation, delivery and setting procedures for cryogenic and high‑pressure equipment.
• Installation, commissioning and startup checks, including instrumentation, controls and safety interlocks.
• Operational practices, monitoring, inspection and maintenance guidance to reduce risk (leak detection, pressure management, overpressure protection).
• Health, safety and emergency response considerations; coordination with applicable OSHA, EPA and fire codes.
• Informative appendices and system flow diagrams illustrating typical bulk gaseous and liquid hydrogen system layouts.

Typical use and users

Primary users include hydrogen producers and suppliers, system designers and engineers, plant owners and operators, site safety managers, installation contractors, code officials, and emergency responders. The standard is used during site planning, permitting, installation, and operation of bulk hydrogen supply installations to help align engineering practice with recognized safety recommendations.

Related standards

CGA H-5 is intended to be used with related CGA publications and other codes and standards addressing hydrogen systems and gas safety, for example CGA G-5 series (hydrogen piping and related guidance), G‑5.4 (hydrogen piping systems at user locations), G‑5.5 (hydrogen vent systems), NFPA 2 (Hydrogen Technologies Code), NFPA 55 (Compressed Gases and Cryogenic Fluids Code), and other CGA position statements and guidance documents referenced in the standard. Users should consult current editions of those documents and applicable local regulations when designing and operating hydrogen supply systems.

Keywords

Hydrogen; bulk hydrogen; hydrogen storage; cryogenic hydrogen; high‑pressure hydrogen; hydrogen supply systems; installation standard; CGA H-5; siting; safety; pressure‑control; vaporizers; compressors; piping; ANSI.

FAQ

Q: What is this standard?

A: ANSI/CGA H-5-2014 is the Compressed Gas Association’s second‑edition standard titled “Standard for Bulk Hydrogen Supply Systems.” It provides recommended minimum practices for siting, installing, commissioning, operating, maintaining and removing bulk hydrogen supply systems.

Q: What does it cover?

A: It covers both bulk gaseous and bulk liquid hydrogen supply systems (gaseous bulk defined as >5,000 scf; liquid bulk defined as >39.7 gal), equipment lists (storage tanks, vessels, vaporizers, pumps/compressors, valves, piping, controls), site and installation requirements, safety and health considerations, and informative flow diagrams. It is limited to systems up to 15,000 psi.

Q: Who typically uses it?

A: Hydrogen producers/suppliers, engineering and installation contractors, facility owners/operators, safety managers, permitting authorities, and emergency planners use the standard to guide safe installation and operation of bulk hydrogen systems.

Q: Is it current or superseded?

A: CGA H-5-2014 (second edition) is superseded by CGA H-5:2020. For new projects and compliance purposes users should consult the most recent edition (CGA H-5:2020) and any subsequent revisions or applicable local codes.

Q: Is it part of a series?

A: Yes — H-5 is part of the CGA family of hydrogen and gas‑handling standards and is cross‑referenced with CGA G‑series documents (e.g., G‑5.4, G‑5.5, G‑5.6), other CGA position statements, and national model codes such as NFPA 2 and NFPA 55.

Q: What are the key keywords?

A: Hydrogen, bulk hydrogen, cryogenic storage, high‑pressure hydrogen, piping, vaporizers, compressors, siting, installation standard, safety, CGA H-5.