International Organization for Standardization (ISO)
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ISO 16528-1:2007
Scope
This part of ISO 16528 defines the performance requirements for the construction of boilers and pressure
vessels.
It is not the intent of this part of ISO 16528 to address operation, maintenance and in-service inspection of
boilers and pressure vessels.
In relation to the geometry of the pressure-containing parts for pressure vessels, the scope of this part of
ISO 16528 includes the following:
a) welding end connection for the first circumferential joint for welded connections;
b) first threaded joint for screwed connections;
c) face of the first flange for bolted, flanged connections;
d) first sealing surface for proprietary connections or fittings;
e) safety accessories, where necessary.
In relation to the geometry of pressure-containing parts for boilers, the scope of this part of ISO 16528 covers
the following:
f) feedwater inlet (including the inlet valve) to steam outlet (including the outlet valve), including all
inter-connecting tubing that can be exposed to a risk of overheating and cannot be isolated from the main
system;
g) associated safety accessories;
h) connections to the boilers involved in services, such as draining, venting, desuperheating, etc.
This part of ISO 16528 does not apply for nuclear components, railway and marine boilers, gas cylinders or
piping systems or mechanical equipment, e.g. turbine and machinery casings.
ISO 16528-1:2007 history
2007ISO 16528-1:2007 Boilers and pressure vessels - Part 1: Performance requirements