SURVEY

Safety shields are made to fit specific flange & fitting sizes. As such, for retrofits, the next step is to perform a site survey. This is not rocket science, 

but it is important to get right first time.

Measurement and dimensions

Please refer to the Survey Guide in the appendix, this provides a full explanation of exactly which measurements to be recorded, along with examples of past surveys.

For standard flanges and simple valves, we just require pipe size and class (eg 2”, 150lb) and a note of the valve type (ball, butterfly). 

Shield location & process line

Measuring a flange is easy enough but fitting a box full of shields is impossible if you don’t know where they are supposed to go! We highly recommend recording 

specific areas and pipe-runs within the plant. If pipe-runs are complex, make additional notes (eg “caustic 2” line, running along floor from Tank No. CA10112)

Individual flange and shield identification?

Some customers create individual flange & shield ID tags. The ID schedule makes routine inspection and replacement orders much easier. We can supply individual tag 

numbers on the shield labels if requested.

Process information

For shield compatibility, it is critically important to note certain process information:

• Process liquid (eg. sulphuric, caustic, lube oil, fuel oil, steam, solvent etc)

• Concentration if applicable

• Maximum temperature

• Maximum pressure (unless you already state pipe class, eg. 150lb)

Surveying & Installing 

If the surveyor knows he/she are also installing the shields, they will generally have a greater attention to detail, both in taking measurement and location information. 

Drawings, photos and model/part numbers

We recommend that you take as much information as possible for non-standard items. Noting down model/part number can help us in identifying dimensions.

 Accompanying photographs or sketches are also very helpful.