Construction compliance: new regulations affect warehouse builds

Todd Hallam

Todd Hallam, EHS director, Chalcroft

London, UK:  Monday 6 April sees the new Construction Design and Management Regulations 2015 come into force, marking the beginning of a six-month transitional period before the deadline date of 6 October.

The new regulations seek to improve compliance with a raft of essential health and safety legislation, says Todd Hallam, EHS director at cold store and warehouse construction company Chalcroft

“Although the technical standards covered by Part 4 of the updated regulations remains largely unchanged from the guidance related to CDM 2007, there are several notable changes to CDM regulations which apply to all commercial businesses of any size and will therefore affect warehouse operators,” he says.

Todd Hallam, EHS Director at specialist cold store and warehouse construction company Chalcroft, explains what do warehouse operators planning construction projects need to know in a detailed article in the June issue of Cold Chain News.

Gray & Adams unveils its CV Show plans

Fraserburgh, Aberdeenshire, Scotland:  Gray & Adams’ line-up in the Cool sector at the CV Show (14-16 April) at Birmingham’s NEC will be a 13.6m lifting-deck trailer in Marks & Spencer’s new ‘Adventures in Imagination’ livery, alongside an 18-tonne rigid commissioned by Burnt Tree’s Refrigerental operation.

Gray & Adams - M&S (3)

Gray & Adams 13.6m lifting deck semi-trailer in Marks & Spencer’s new ‘Adventures in Imagination’ livery

Outside the show halls, Gray & Adams will present another 18-tonner in the colours of UK baker, Greggs.

“These are three prestigious names so we’re delighted that they’ve agreed to support us,” says Gray & Adams joint managing director Peter Gray. “The CV Show is a great event and we look forward to meeting as many established and prospective customers as possible.”

The Marks & Spencer trailer employs a series of cleverly engineered measures that allow it to carry 44 pallets, 10 per cent more than a standard 13.6m double-decker.

It has a Thermo King SLXe low noise, low emission refrigeration unit and two S3 evaporators, and is fitted with the manufacturer’s latest-generation panel cappings, which are more aerodynamically profiled than its previous, standard one-piece versions – the new cappings help to reduce diesel consumption as well as giving the trailer or rigid vehicle a more modern, streamlined appearance.

The Refrigerental vehicle will also wear a new livery. Gray & Adams’ insulated body is based on a Daf chassis and has a moving longitudinal lane for load-carrying flexibility. It is equipped with a 1500kg Dhollandia flat platform tail-lift, while cooling is via a multi-temperature Thermo King T-1000 Spectrum unit.

Completing the line-up in Birmingham, Greggs’ 18-tonne Scania is fitted with Gray & Adams’ well proven body design, which incorporates a compression buffer system developed to minimise damage while operating on loading docks, as well as a movable Variable Stow bulkhead for maximum cargo carrying flexibility and a 1500kg Dhollandia column tail-lift.  Another Thermo King Spectrum multi-temp fridge – in this case a T-1000R – provides the refrigeration.

• The Commercial Vehicle Show, Britain’s leading road transport and logistics event returns to the NEC in Birmingham on April 14 – 16, 2015, and with just two weeks until the doors open, it’s time to register for your free ticket! Click here enter your details and receive your free fast track entry badge and money off breakfast voucher. It really is that easy.

US: Video explains hydraulic shock incident at Millard Refrigerated Services

Washington, DC, US: Video explains hydraulic shock incident at Millard Refrigerated Services showing what happened Aug. 23, 2010, when 32,000 pounds of anhydrous ammonia leaked at a Millard Refrigerated Services Inc site. Thirty-two contract workers off site were hospitalized after exposure to the cloud.

A new video from the US Chemical Safety Board explains how 32,000 pounds of anhydrous ammonia leaked at a Millard Refrigerated Services Inc. facility on Aug. 23, 2010, an accident that caused more than 150 off-site workers to be exposed to the toxic gas cloud.

Thirty-two of them were hospitalized, including four in an intensive care unit. The seven-minute video is titled “Shock to the System” and includes a detailed 3D animation of the events that led up the ammonia release; it is based on CSB’s related safety bulletin, “Key Lessons for Preventing Hydraulic Shock in Industrial Refrigeration Systems.”

Chairperson Rafael Moure-Eraso said the video “is a valuable tool intended for use at the large number of facilities that utilize anhydrous ammonia. The key lessons learned from our investigation, examined in our report and in this video, can help facilities prevent a similar accident from occurring due to hydraulic shock.

The CSB investigation found that the day before the leak, the Millard facility lost power for more than seven hours. During that time, the refrigeration system was shut down. The system regained power Aug. 23 “and was up and running, though operators reported certain problems. While doing some troubleshooting an operator cleared alarms in the control system, which reset the refrigeration cycle on a group of freezer evaporators that were in the process of defrosting. This resulted in both hot, high-pressure gas and extremely low temperature liquid ammonia to be present in the coils and associated piping at the same time. This caused the hot high-pressure ammonia gas to rapidly condense into a liquid.

Because liquid ammonia takes up less volume than ammonia gas – a vacuum was created where the gas had condensed,” according to the agency’s release. “The sudden pressure drop sent a wave of liquid ammonia through the piping, causing a sudden pressure surge known as ‘hydraulic shock.’ This abnormal transient condition results in a sharp pressure rise with the potential to cause catastrophic failure of piping, valves, and other components.”

The video shows how the pressure surge ruptured the evaporator piping manifold inside one of the freezers, causing a 12-inch suction pipe on the roof of the facility to catastrophically fail. One Millard employee was hurt when he fell while attempting to escape from a crane after it became engulfed in the resulting ammonia cloud.

The cloud traveled a quarter mile from the facility south, toward an area where 800 contractors were working outdoors at a cleanup site for the Deepwater Horizon oil spill. CSB said 152 of those workers and ship crew members reported symptomatic illnesses from ammonia exposure.

Key lessons from the investigation are avoiding manual interruption of evaporators in defrost and requiring control systems to be equipped with password protection to ensure only trained, authorized personnel have the authority to manually override systems.

On the day of the incident, the control system did not recognize that the evaporator was already in the process of defrosting and allowed an operator to manually restart the refrigeration cycle without removing hot ammonia gas from the evaporator coil. Another lesson is that an emergency shutdown should be activated in the event of an ammonia release if a leak cannot be promptly isolated and controlled.

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