The safety standards adhered to by the UK High Pressure Gas Regulator are pivotal in ensuring the protection of individuals, property, and the environment in gas handling and distribution systems. These standards encompass a comprehensive framework of regulations, guidelines, and industry best practices aimed at mitigating risks associated with pressure regulation, gas handling, and equipment design. 

British Standards Institution (BSI):
The BSI is one of the primary organizations responsible for developing and maintaining standards in the United Kingdom. For gas regulators, the BSI publishes standards such as BS EN ISO 2503: Gas welding equipment — Pressure regulators and pressure regulators with flow-metering devices for welding, cutting and allied processes — Classification, and BS EN ISO 7291: Gas equipment — Threaded fitting connections for industrial gas cylinder valves — Specifications.
European Committee for Standardization (CEN):
The CEN develops European standards (EN) that are adopted by member countries, including the UK. Standards such as EN 334: Pressure regulators for gas cylinders and EN ISO 2503 (adopted from the International Organization for Standardization) provide specifications and requirements for gas pressure regulators.
Health and Safety Executive (HSE):
The HSE is the UK's national regulator for workplace health and safety. It provides guidance and regulations related to the safe handling of gases, including pressure regulation equipment. Gas Safe Register, managed by the HSE, ensures that gas engineers are competent and that gas work meets safety standards.
Gas Appliances Regulation (GAR):
The GAR applies to appliances burning gaseous fuels and their fittings in the European Union. It ensures that gas appliances and their components meet essential safety requirements, including those related to pressure regulation. Compliance with GAR is essential for gas regulators sold or used within the UK.
ISO Standards:
While not specific to the UK, various ISO standards related to gas equipment and safety are commonly referenced and implemented by manufacturers. ISO 2503, ISO 7291, and ISO 5171 are examples of ISO standards relevant to gas regulators.
Industry-specific Standards:
Certain industries may have additional safety standards or guidelines specific to their applications. For instance, the healthcare industry may refer to standards such as HTM 02-01 for medical gas pipeline systems, which includes requirements for gas pressure regulation equipment.
Manufacturer Specifications:
Manufacturers of high-pressure gas regulators often adhere to internal quality control standards and specifications, ensuring that their products meet or exceed regulatory requirements and industry best practices. Compliance with manufacturer specifications is crucial for ensuring the safe and effective operation of gas regulators.