NCC 2019 Volume One
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Tas Part H115 Premises for production or processing of isocyanates

Tas Part H115 Premises for production or processing of isocyanates

Tas H115.1 Application of Part

This Part is applicable to every building in which isocyanate production or processing is undertaken.

Premises for the production or processing of isocyanates must—

(a)

provide for the safety and comfort of workers; and

(b)

be constructed in a manner that will avoid the spread of fire within the building and to other buildings.

Tas H115.2 Areas of work places

Work places in which an isocyanate industry is carried on must be divided into the following divisional areas:

(a)

Administration and staff amenities.

(b)

Workshop.

(c)

Bulk stores.

(d)

Curing room.

(e)

Processing plant.

(f)

Raw materials plant.

(g)

Manufacture.

Tas H115.3 Separation from other areas and buildings

(a)

Each of the divisional areas required by Tas H115.2 other than the administration and staff amenities building, must be—

(i)

separated from each of the other divisional areas by means of an impervious wall with an FRL not less than 120/120/120; or

(ii)

separated from all other buildings by a clear space of not less than 6 m.

(b)

Notwithstanding the distance requirements of (a), bulk stores of polyols and bulk stores of isocyanates must comply with the requirements of the Work Health and Safety Act.

Tas H115.4 Rise in storeys

The building must be of single storey construction.

Tas H115.5 Maximum floor areas

The floor area of any building or fire-separated section must not exceed the area shown in Tas Table H114.4.

Tas H115.6 Required exits

(a)

Every building or divisional area of a work place must have not less than 2 exits for escape purposes.

(b)

The number and location of the exits must be such that any point on the floor is not more than 20 m from one of the exits.

(c)

Only exits with vertically hinged swinging doors may be considered as exits for the purposes of this clause.

Tas H115.7 Bulk stores for polyols and isocyanates

(a)

A bulk store for polyols must be constructed from non-combustible materials and have a smooth impervious concrete floor and it must protect the polyols from direct exposure to the sun's radiation.

(b)

A bulk store for isocyanates must—

(i)

be constructed from non-combustible materials, have a smooth impervious concrete floor, and must protect the isocyanate containers from direct exposure to the sun; and

(ii)

if it is used for storage of either TDI or HDI and is not an open sided building, be fitted with mechanical ventilation so that the TLV is not exceeded at any time provided that the ventilation must provide not less than 6 air changes per hour.

(c)

The area around both a polyol bulk store and an isocyanate bulk store must be bunded, the bund or bunds must ensure separation of the polyol and isocyanate areas and each bund must have a capacity of 10% more than the storage capacity of the largest tank it protects.

Tas H115.8 Curing room

The curing room for the storage of newly produced flexible polyurethane foam must be constructed of non-combustible materials with a smooth impervious concrete floor and fitted automatic fire vents in the roof.