TITECH Trailing Shields 2.0 Series Manuel utilisateur

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

Trailing Shields® 2.0™

for Titanium and Stainless Steel Welding

USER INSTRUCTIONS

MADE IN NORWAY

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

QUICK START PAGE 2

This Quick Start guide to using Trailing Shield® 2.0™ is not intended to

replace the User Instruction Manual, which we request that you read in its

entirety at some time, however where it is important to use the system

immediately, these quick steps can be used.

1. Unpack the Trailing Shield® 2.0™and check it is the correct size and

style as ordered. There should be 1 or 2 blue hoses attached depending on

style ordered and fitted with white silicone side skirts. If any of these are

missing, please contact us immediately.

2. Attach the shield to your welding torch by tightening the jubilee clip to

the gas cup on the torch.

3. Attach the argon supply to the blue hose on the Trailing Shield® 2.0™.

4. Make sure welding torch is in correct position and place shield on or

around piece to be welded.

It is advisable to make a test weld on a scrap piece of material before

welding the critical material.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

INDEX PAGE 3

Quick start 2

Index 3

Introduction 4

Fitting your Trailing Shield® 2.0™5

Connecting the purge gas supply 6

Purge gas 7

Gas flow rates 8

Trouble shooting 9

The family range of Trailing Shield® 2.0™10

Other languages 11

Customer support and worldwide care 12

Warranty 13

Address and contact details 14

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

INTRODUCTION PAGE 4

Thank you for purchasing one of our Trailing Shield® 2.0™for the

welding of titanium, zirconium, stainless steels, duplexes and other

reactive metals and alloys.

The affinity of hot metals and alloys for gases such as oxygen, nitrogen

and hydrogen means that inert gas shielding is essential during welding.

When welding titanium, zirconium, stainless and duplex steels the use of

Trailing Shield® 2.0™ will protect the hot metal by leaving it covered

with an inert gas shield for some time after the weld torch has moved

forward onto new metal. Careful use and following these instructions could

help you to produce zero colour welds.

Stainless and duplex steels etc will oxidise in the presence of oxygen,

leaving slag at worst and heavy oxide to be cleaned off at best. Avoid this

lengthy and expensive work by using a Trailing Shield® 2.0™.

Inert gas protection is needed for not only the molten pool, but also for the

hot solid metal behind the weld torch. This is why you have purchased a

Trailing Shield® 2.0™.

The Trailing Shield® 2.0™come ready for use and merely need to be

attached to the welding

torch which is to

be used and to

have the purge

gas supply

connected.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

FITTING YOUR TRAILING SHIELD PAGE 5

Each radiused (OD/ID) Trailing Shield® 2.0™is made for the exact

diameter of pipe or vessel being welded, with the contours being matched

to outside or inside welding.

Flat (FL) versions are also available for the welding of flat sheet products.

You will have ordered the Trailing Shield® 2.0™ to suit either a

MIG/TIG torch nozzle or a plasma torch nozzle for either manual or

automatic welding, so the jubilee clip attached to the Trailing Shield®

2.0™ should match your specified requirements.

If the jubilee clip is the wrong size, then you can either return it to us to

have another one fitted or you can fit your own fairly easily by undoing the

old one and putting a new one on.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

CONNECTING THE PURGE GAS SUPPLY PAGE 6

As you will see, the Trailing Shield® 2.0™ have their own purge gas line

and connection and you will need to join the fitting provided, to a suitable

argon gas supply. The only connection provided is a male fitting and the

female matching fitting is to ensure your argon gas line has a shut-off

capability. If you do not have access to these fittings, see the spares list

attached.

Should you wish, you may remove the male fitting which we provide and

use your own connectors.

After connecting the Trailing Shield® 2.0™ to the respective gas cup,

tape over the gap left on the top of the Trailing Shield® 2.0™ between

the shield and the nozzle, this is to cover the small air gap between the

torch and the shield to prevent air from entering.

The gaskets are made of silicone rubber and are

resistant to a temperature of up to 230˚C. These

gaskets will eventually become burnt, damaged and

worn and you can purchase replacement gaskets or

lengths of gasket material through TiTech

Production AS who will provide details of your

nearest distributor.

The gasket material is available in both hard and soft options which can be

selected depending upon the method of use and the wear rate. The soft

material is semi-translucent whereas the harder material is white and

opaque.

The hard, white silicone gaskets are suitable for higher heat input

applications, than the clear, translucent gaskets. If the gaskets become

burned, they can be removed and replaced the other way around with the

undamaged side inwards.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

PURGE GAS PAGE 7

Always ensure that your source of inert purge gas is a quality controlled

source providing you with the right degree of purity for the welding job in

hand.

For example, titanium should be welded with argon, which is 99.9995%

pure, that is 5 ppm of impurities.

For stainless steels, it is possible to relax the specification by one order of

magnitude, i.e. 99.995% pure or 50 ppm impurities.

If your welding code allows, an argon/ hydrogen mixed gas can be used

for stainless steel (not titanium or zirconium). The hydrogen helps to ‘mop

up’ any residual oxygen atoms that might be left buzzing about in the weld

space.

If you use a lower grade argon, the Trailing Shield® 2.0™may not

provide the benefit for which they were intended.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

GAS FLOW RATES PAGE 8

You can set your gas flow rates from 5- 10 l/m (10 - 20 cfh). This will

depend upon the material, its thickness, the gas type and the speed of the

welder. It is possible to have the flow rate higher as well because of the

three layers of stainless steel mesh inside the shield, which gives a smooth,

laminar, non-turbulent flow.

Fit a gas lens into the welding torch to distribute the shield gas evenly from

there as well. Be careful not to use a phenolic or a plastic nozzle, to avoid

contaminating the weld with Carbon.

If you have purchased a Trailing Shield® 2.0™ for automated welding

you may wish to use a greater flow of purge of gas. As a rule of thumb, if

the welding speed is between 15 - 25 inches/ min (380 - 630) mm/min and

the welding current between 325 - 360 amps, the gas flow rate would be

60 cfh (28 l/m).

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

TROUBLE SHOOTING PAGE 9

Should the Trailing Shield® 2.0™ still be giving oxidised welds, even

though the quality of the weld gas has been assured, you should check the

connections and the hoses. If possible, measure the quality of the argon gas

being emitted from the Trailing Shield® 2.0™.

If you have no means of measuring the quality of the purge gas, place the

welding torch with its Trailing Shield® 2.0™ onto a piece of material and

make a small linear weld, typically ½ inch long, ensuring a pre-purge time

of at least 20 seconds and a post purge time of about 30 seconds.

If the weld is not bright and shiny after this proceedure then it is correct to

assume that there will be a leak in the hose connections or that the gas is

not of the quality expected.

It is unlikely that the Trailing Shield® 2.0™in itself would contribute to

oxidised welds, unless it has been abused, such as being left out in a wet

environment.

If there is any doubt about the cleanliness of the Trailing Shield® 2.0™,

remove the gaskets and any other rubber or plastic fittings and bake the

Trailing Shield® 2.0™ in an oven up to about 100˚C (212˚F) for 1 hour

and that will ensure that any volatile products inside the Trailing Shield®

2.0™boil off leaving the inside clean and dry.

In the event that all such tests have been carried out and oxidised welds are

still occuring then return the product and we will test it in our welding

laboratory for you.

In the event that our Trailing Shield® 2.0™ does not perform and is

undamaged, it will be replaced free of charge within the first 12 months of

purchase.

TITECH GROUP TITECH PRODUCTION AS

Stålverksvegen 46, 4100 Jørpeland |POST: Stålverksvegen 46, Jørpeland 4100, Norway |P: +47 45 20 56 22 |

TITECH GROUP TITECH PRODUCTION AS

Range of TRAILING SHIELD® 2.0™PAGE 10

TRAILING SHIELD® 2.0™ - OD

The OD range from ½” – 76”

TRAILING SHIELD®2.0™ - ID

The ID range from 4” – 76”

TRAILING SHIELD® 2.0™ - FL

For sheet welding.

TRAILING SHIELD® 2.0™ - MINI

For small parts and o-let welding

TRAILING SHIELD® 2.0™ - AUTO

Made for automatic welding.

TRAILING SHIELD® 2.0™ - OC

Made for outside corner.

Custom Trailing Shield® can be made.

All Trailing Shield® are made in Norway.

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