scope:

Intent

The rules of this Division constitute requirements for the design, construction, inspection, and overpressure protection of metallic pressure vessels with design pressures generally above 10 ksi (70 MPa). However, it is not the intent of this Division to establish maximum pressure limits for either Section VIII, Division 1 or 2, nor minimum pressure limits for this Division. Specific pressure limitations for vessels constructed to the rules of this Division may be imposed elsewhere in this Division for various types of fabrication.

Description

Pressure vessels within the scope of this Division are pressure containers for the retainment of fluids, gaseous or liquid, under pressure, either internal or external.

This pressure may be generated by

(a) an external source

(b) the application of heat from

(1) direct source

(2) indirect source

(c) a process reaction

(d) any combination thereof

Laws or Regulations

In those applications where there are laws or regulations issued by municipal, state, provincial, federal, or other governmental agencies covering pressure vessels, those laws or regulations should be reviewed to determine size or service limitations of the coverage which may be different or more restrictive than the rules of this Division. 

Location

Fixed Location. Except as provided in KG-104.2, these rules cover vessels to be installed at a fixed (stationary) location for a specific service where operation and maintenance control is retained during the useful life of the vessel by the User who prepares the User's Design Specification required by KG-310.

Mobile Vessels. These rules also apply to pressure vessels which are relocated from work site to work site between pressurizations, provided prior written agreement with the local jurisdictional authority can be obtained covering operation and maintenance control for a specific service. This operation and maintenance control shall be retained during the useful life of the pressure vessel by the User who prepares the User's Design Specification required by KG-310.

(a) Loading conditions imposed by loading, transportation, or unloading of the pressure vessel at or between work sites shall be considered according to Article KD-1.

(b) Vessels may be installed in transport vehicles provided prior written agreement with the local jurisdiction authority¹ is established covering operation and maintenance control for specific service and where this operation and maintenance control is retained during the life of the vessel by the User who prepares or causes to be prepared, the User's Design Specification. (See KG-310.)

Direct Fired

Pressure vessels which are subject to direct firing and are not within the scope of Section I may be constructed to the rules of this Division, except as excluded by KG-120.

¹ The local jurisdictional authority consists of the municipal, state, provincial, federal, or other governmental agency or agencies enforcing laws or regulations applicable to these pressure vessels.