Page 92: of Maritime Reporter Magazine (August 2018)

TECH FILES

Heating Coil Repair with No Welding

BY CHRIS PEITCHINIS, VP, TUBE-MAC PIPING TECHNOLOGIES LTD.

Tube-Mac provides a non-welded

Left: Ibaizabal crew member installed

PYPLOK ? ttings using Model 55 Tool solution called PYPLOK for shipyards and 44.5 mm Head assembly. For to repair heating coils inside hazardous safety reasons, an ATEX approved areas, highlighted in a couple of recent pneumatic (air) pump XA11G was repair jobs. For the oil tankers Montes- used to activate the PYPLOK tool.

peranza & Montestena from Ibaizabal

Group, the repair jobs were carried out

Right: The permanent repair was in Navantia’s repair shipyard in Ferrol, completed safely with out the hazards of welding using PYPLOK 360° radial

Spain, by the ships’ own crew. Both swage non-welded ? tting technology.

tankers had leaks in the welded ? ttings

Photos: Tube-Mac of heating coil tubes in COT and SLOP tanks. The leaks were due to defective pair. Ibaizabal’s wanted a safe, reliable In this case the steam leaks of the pipes common inside tanks,” said Pablo de welds of socket weld couplings during and permanent leak free connection. were inside the service fuel tanks. The Celis, from Metalships & Docks. “With the ships construction. The 44.5 x 2.0 Tube-Mac proposed to repair the heat- pipes were 2-in. Schedule 40 (60.3x3.91 a brief training, our staff was trained by mm wall tubes were made of Aluminum ing coil tubing with 44.5mm copper mm) carbon steel pipes, and the system Tube-Mac to carry out the repair job

Brass and the system operated at 168 nickel (CuNi) PYPLOK ? ttings. Spe- operated at 168 °C and 7 bar working ourselves” °C and 7 bar operating pressure. The ci? cally, PYPLOK ? tting type 301 was pressure. As in Case Study 1, due to the hazard- leaking tube connections were wrapped selected, which is a specially designed Metalships wanted to eliminate the ous environment a pneumatic (air) pump with a reinforced tape as temporary re- elongated maintenance ? tting for con- leaks using a cold method, quickly and unit was used to operate the PYPLOK pair, which did not solve the problem. necting two tubes with a gap left after permanently, in an explosion risk envi- swaging tool. The whole process took

Ibaizabal’s aim was to be able to per- cutting out the welded ? ttings. ronment. There was some fuel and resi- 20 minutes per connection from which manently repair the ships’ piping with The welded ? ttings were cut using due inside the tanks. PYPLOK’s non- the actual swaging time of the PYPLOK no hot work. This way it could elimi- a pneumatic reciprocating saw and welded ? tting was the solution chosen. ? tting was less than 5 minutes. nate several costly and time-consuming the entire repair process from cutting, Metalships was able to repair the lines PYPLOK ? ttings from Tube-Mac are processes required by welded connec- cleaning, deburring and swaging the safely and without the fear of explosion, available in carbon steel, 316 stainless tors. For example, using a cold worked PYPLOK ? tting took 30 minutes to thanks to PYPLOK non-welded tech- steel, duplex, super duplex and cop- solution, the repair could connect the complete. The actual swaging process nology. The section of leaking pipe was per nickel (CuNi 70/30). It is one of tubes even with traces of fuel and fumes took less than 5 minutes. cut out using a manual hand saw and the only ? ttings in the world availa-ble inside the con? ned spaces of the tanks. In another case, Spanish shipyard replaced with new piece of pipe using for NPS pipe, OD tube and Metric tube

They would also avoid the need of ? re Metalships & Docks, from Vigo, Spain, two standard straight PYPLOK ? ttings. sizes with a wide range of shapes and watch personnel and ? re extinguishing carried out the repair jobs on heating “PYPLOK has provided us with a end connec-tions. More notably, Tube- equipment. The on-site installation time coil lines in two container ships – AS way to reduce time, improving costs Mac is the only company to offer a non- would be greatly reduced and they could Federica & Stadt Gera – using PY- and simplifying the tasks necessary for welded metric CuNi ? tting for 44.5mm, use the ship’s crew to complete the re- PLOK non-welded ? ttings. the repair of this type of leak-age, very 57mm and 76mm metric CuNi tubes.

MJP Debuts Next-Gen Waterjets

At SeaWork International in Southampton Marine Jet Power (MJP) introduced the X Series, a new waterjet propulsion range that the company claims comes in at a “much lower price point” while reducing power demand by up to 20 percent and reducing weight up to 10 percent. Designed from the start with an eye on ease of maintenance in the ? eld, key features of the X Se- ries include one-piece skidded installation and easily accessible inspection hatches. “We’ve really taken the time to design and engineer this product with designers, builders and operators in mind,” said Magnus Sörenson, MJP CEO. “This product is easy to install and even easier to maintain in the ? eld, saving time and money over the total lifecycle of the product.”

The X Series has been optimized to integrate with the com- pany’s JetMaster 3 electronics system, but it is also designed for hydromechanical (HM) controls. The series currently features three sizes, the 280X, 310X and 350X, with the 310X available now and on display at SeaWork International. The 280X and the 350X are both under development and will be available in 2019.

www.marinejetpower.com

Photos: MJP 92 Maritime Reporter & Engineering News • AUGUST 2018

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