Standard codes are followed when designing (or manufacturing) a piping system. Organizations which promulgate piping standards include:
* ASME: American Society of Mechanical Engineers
** A112.19.1 Enameled cast-iron and steel plumbing fixtures standards
** A112.19.2 Ceramic plumbing fixtures standard
* ASTM International: American Society for Testing and Materials
* API: American Petroleum Institute
* AWS: American Welding Society
* AWWA: American Water Works Association
* MSS: Manufacturers Standardization Society
* ANSI: American National Standards Institute
* NFPA: National Fire Protection Association
* EJMA: Expansion Joint Manufacturers Association
* CGA: Compressed Gas Association
*PCA: [https://ablis.business.gov.au/service/ag/the-plumbing-code-of-australia-pca-/31066 Plumbing Code of Australia]
Pipes must conform to the dimensional requirements of:
* ASME B36.10M: Welded and seamless wrought-steel pipe
* ASME B36.19M: Stainless-steel pipe
* ASME B31.3 2008: Process piping
* ASME B31.4 XXXX: Power piping