Specification 30 Installation of boilers and pressure vessels
2019: Spec G2.2: 1
This Specification sets out the requirements for the installation of boilers and pressure vessels in buildings.
2019: Spec G2.2: 2.1
The distance between the vent of any explosion relief device for a boiler or pressure vessel and any adjacent wall, roof, ceiling or other solid construction shall be calculated in accordance with Table S30C2.
|Clearance from||Minimum clearance (metres)|
|Adjacent wall or ceiling/roof||or 0.4 m, whichever is the greater|
|Two walls at right angles; or one wall and a ceiling/roof||or 0.6 m, whichever is the greater|
is the internal volume of the boiler or pressure vessel being vented up to the connection of the flue.
Floors and drainage
2019: Spec G2.2: 2.2
Protection from heat
2019: Spec G2.2: 2.3
Building elements surrounding a boiler must be protected from any surface heat by refractory material or effective air spaces so that—
- steel elements do not exceed a temperature of more than 300°C; and
- concrete elements do not exceed a temperature of more than 200°C; and
- timber elements do not exceed a temperature of more than 150°C.