Project name: Chemical Plant Gas Detection Upgrade.
Industry: Pulp & Paper.
Location: N.I. Central, New Zealand.
New Zealand’s largest chlorine production and storage site required additional gas detection. The age of the plant was an important factor in the risk assessment potential for gas leaks of one of the most toxic industrial gases. Replacement of existing detectors had traditionally been on an ad-hoc basis and the hazardous area standard acceptable in the New Zealand market had changed from ATEX to IEC Ex. There was also increased interest from the customer for instruments that met an international Safety Integrity Level (SIL 2 or SIL3).
There are a number of toxic gases on this site, including chlorine, chlorine dioxide, ammonia, hydrogen sulphide as well as flammable gases such as methane which is the main constituent of natural gas used on boilers, furnace and kilns.