Codes and Standards
There are a number of codes and standards, laws, and regulations covering boilers and related equipment that should be considered when designing a system. Regulatory requirements are dictated by a variety of sources and are all focused primarily on safety. For more information on how the various rules affect boiler selection and operation, you may want to contact your local Cleaver-Brooks authorized representative. Here are some key rules to consider:
- The boiler industry is tightly regulated by the American Society of Mechanical Engineers (ASME) and the ASME Codes, which govern boiler design, inspection, and quality assurance. The boiler's pressure vessel must have an ASME stamp. (Deaerators, economizers, and other pressure vessels must also be ASME-stamped).
- The insurance company insuring the facility or boiler may dictate additional requirements. Boiler manufacturers provide special boiler trim according to the requirements of the major insurance companies. Special boiler trim items usually pertain to added safety controls. Some industries, such as food processing, brewing, or pharmaceuticals, may also have additional regulations that have an impact on the boiler and the boiler room. A UL, ULC, cUL, CSA or CGA listing, or Canadian Registration Number (CRN) may be required. State, local, or provincial authorities may require data on the boiler controls or basic design criteria.
- Most areas have established a maximum temperature at which water can be discharged to the sewer. In this case, a blowdown separator with aftercooler is required.
- Most state, local, or provincial authorities require a permit to install and/or operate a boiler. Additional restrictions may apply in non-attainment areas where air quality does not meet the national ambient air quality standards, and emission regulations are more stringent.
- For all new boilers with input over 10 MMBTU/hr, U.S. federal emission standards apply, including permitting and reporting procedures. Limits on fuel sulfur content are frequently set at 0.5% maximum.
- A full-time boiler operator may be required. Operator requirement depends on the boiler's size, pressure, heating surface, or volume of water. Boilers can be selected which minimize the requirements, either by falling under the requirements and being exempt, or with special equipment that gives the operator more freedom in the facility.
- Most states and provinces require an annual boiler inspection. There may be other requirements on piping, as well.