Stain­less steel tub­ing – fast and re­li­able

DEMM Engineering & Manufacturing - - MAINTENANCE MATTERS -

Fol­low­ing the dev­as­tat­ing Christchurch earth­quake in 2011, Pa­cific Can­ner­ies needed to re­lo­cate their plant into a new, pur­pose-built Paua (Abalone) pro­cess­ing fa­cil­ity next door to their ex­ist­ing op­er­a­tion.

They con­tin­ued to op­er­ate in their ex­ist­ing plant while the de­sign and con­struc­tion of the new build­ing took place, so they could meet their cus­tomers’ needs.

They planned to use ex­ist­ing cap­i­tal equip­ment such as their re­tort cooker and can­ning lines. This meant the new build­ing would need to be com­plete with all the wa­ter and com­pressed air lines in­stalled and ready to con­nect the equip­ment, min­imis­ing the plant down time.

The project was over­seen by PauaCo’s op­er­a­tion man­ager, Johno Leitch. The plant re­quired more than 500 me­tres of tube for their hot and cold wa­ter sup­plies, and com­pressed air lines for their cooker and wash down hoses.

The majority of the pipework was lo­cated in­ter­nally. How­ever, there was a need for some wa­ter lines to be out­side, need­ing spe­cific con­sid­er­a­tion for the hot wa­ter line in­su­la­tion.

Be­ing a food pro­cess­ing fa­cil­ity, all ma­te­ri­als such as the pipework used in the project had to meet food safety stan­dards.

Re­duc­ing fire risk by min­imis­ing the use of flames from weld­ing on site was also im­por­tant for Pa­cific Can­ner­ies, as the build­ing was con­structed out of in­su­lated sand­wich pan­els.

Johno re­viewed a num­ber of tube op­tions for their pipework be­fore se­lect­ing Kem­bla’s KemPress stain­less steel press fit sys­tem. Be­ing made from 316L grade stain­less steel, it met their food safety re­quire­ments. The press fit sys­tem elim­i­nated the need for on-site weld­ing of the tube, as well as speed­ing up the in­stal­la­tion.

He says: “Us­ing steel pipe was an op­tion for us, but de­spite those ma­te­ri­als be­ing cheaper, the speed of in­stalling the KemPress meant the over­all in­stalled cost was a bet­ter for us.”

The sys­tem was in­stalled by their spe­cial­ist con­trac­tor who was trained by Kem­bla prior to the job com­menc­ing. The same con­trac­tor was also in­volved with the in­stal­la­tion of equip­ment in the plant as it be­came avail­able, mean­ing the tube in­stal­la­tion was in­ter­rupted a num­ber of times.

Johno said “The in­stal­la­tion was quick and sim­ple, and would have been quicker had we not had to stop and start while we moved onto other jobs as new equip­ment ar­rived on-site.”

Nexus Ther­mo­break was used to in­su­late the in­ter­nal hot wa­ter lines, with its split length mak­ing it easy to in­stall on the al­ready in­stalled pipework. Its low chlo­ride con­tent min­imises the chance of pit­ting cor­ro­sion oc­cur­ring on the tube should con­den­sa­tion be present. No Clad was used on the ex­ter­nal lines. No Clad is made of the same low chlo­ride in­su­lat­ing ma­te­rial as Ther­mo­break, with a harder outer cov­er­ing, mak­ing it resistant to birds peck­ing at it which would re­duce its in­su­lat­ing prop­er­ties.

The KemPress was suc­cess­fully in­stalled with no leaks, help­ing Pa­cific Can­ner­ies achieve its plant com­mis­sion­ing sched­ule on time.

www.demm.co.nz/read­eren­quiry #141131

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