Joint Types

From our website you can specify and order stainless steel shields for flanges, and fabric shields for the following joint types:

Flange Coupling Tee-Joint Elbow

Please note that we can make shielding for a wide variety of valves, expansion joints, pumps and other non-standard items. Please contact us if you have any such shielding requirements and we will provide you with a quotation.

Flange sizes and pressure ratings explained

Flanges come in a variety of sizes, and are selected to match specific pipe sizes and pipeline pressure ratings. Our shields are made to exactly fit specific flange sizes – and to do so we ideally need to know:-

1. Flange rating / class (see ‘flange ratings’)
Flanges are manufactured to one of a number of International Standards (typically ANSI for North America, DIN for Europe, JIS for Japan etc). Each standard will have a number of pressure ratings to pick from, eg:-

ASA 150lb, 300lb, 600lb, 900lb, 1500lb, 3000lb etc
(where ‘lb’ = pounds per square inch)

DIN PN6, 10, 16, 25, 40, 64, 100 etc
(where the pressure rating is in BAR)

2. Pipe size
otherwise known as Nominal Bore (NB) which is effectively the inside diameter of the pipeline itself, which is expressed in inches for North American and some UK flange classes, and millimetres for European classes, e.g :

¼”, ½”, ¾”, 1”, 1 ¼”, 1 ½”, 2”, 2 ½” onwards

DN 15mm, 20mm, 25mm, 40mm, 50mm, 65mm, 80mm, 100mm etc

These two items of information are all that we need to specify the shield type. Once you’ve selected the shield material, you simply pick the flange rating and pipe size. If you do not have any dimensions, simply measure the pipe size and flange diameter. Callipers make this simpler, but if not available, measure circumference and divide by Pi (3.142).

Normally the rating/class and pipe size is printed on the outside edge of the flange or can otherwise be easily identified.

If you know the pipe size or the flange diameter only, the attached flange-dimensions chart will identify the flange class/rating.

Download our Safety Shield specification tables

To help determine the correct safety shield for your application please download our PDF specification table using the link below.

For instructions on how to use the table to identify the correct shield, please click the image on the right which will provide you with step by step instructions on how to identify the correct class of safety shield.

Download Safety Shield Specification Tables

Click here to specify your shields and place an order