Flange Guards Are Very Important For Maintaining A Safe Environment In Industries Especially Pharmaceutical, Chemical & Oil Industries. Flange Guards Are Spray Shield Put Around Flanges In Anticipation Of Spray Outs Due To Flange Failure. Flange Guards Arrest The Spray Outs Before It Can Do Any Damage To The Working Staff Or Equipments.

However It’s Very Important To Choose The Correct Shield Material As Only That Will Enable Flange Guards To Fulfill Its Objective. Where An Correct Flange Guard Shield Material Can Provide An Excellent Safety, A Wrongly Chosen Flange Guard Material Can Lead To Catastrophic Accidents.

So Now The Million Dollar Question Is That “How To Choose The Correct Flange Guard Material?”

Choosing The Correct Flange Guard Material, Whether PTFE, SS316, PP – Hdpe, Is Very Simple. Below Is A Step By Step Guide Which Will Help You Arrive At The Perfect Shield Material. You Can Also Write To Use For Assistance In Choosing The Correct Flange Guard Material.

Step 1: Determine The Type Of Liquid Flowing Through Your Pipes:

1. Acids, caustics, solvents, fuel, lubrication

2. Water-based liquids and low-con chemicals like Medical Industries

3.Highly Concentrated Acids, seal & hydraulic oil, steam and other chemicals

For Type A, Flange Guards Made From PTFE Material Can Provide The Maximum Safety. For Type B, Using PP & HDPE Flange Guards Is Recommended As The Liquid Is Not Very Harsh. For Type C, S316Flange Guards Can Be Used. This Classification Is Subject To The Temperature & Pressure As Mentioned In Step 2.

Step 2: Determine The Temperature

Different Shield Materials Can Support Different Temperature. Subject To The Above Segmentation, The Following Is The Temperature Range Of Support For Each Flange Guard Material

1. PP – HDPE FLANGE GUARD : Upto 90 °C


3. SS316 Flange Guards: Upto 600 °C

4. Other SS Flange Guards: 600 °C & Above

Step 3: Determine The Pressure:

Pressure Also Plays A Important Factor While Deciding Upon A Flange Guard Material. Material Should Be Capable Enough To Handle The Pressure Of The Spray Outs.

1. PP-HDPE Flange Guards:Upto 300 PSI


3. SS Flange Guards: Upto 2000 PSI

However If You Need Flange Guards Of A Particular Shield Material For A Higher Value Of Pressure Support, We Can Help You Out With The Same.

All The 3 Variable Have To Be Taken Into Account While Choosing The Shield Material. For Example: If You Want To Use The Flange Guard For Water Based Solutions, PP & HDPE Flange Guards Would Be Sufficient For You Till 90 °C. But If The Temperature Is Say 225 °C, You Will Have To Opt For PTFE Flange Guard. Now In The Case If The Pressure Is Above 900 PSI, You Will Have To Use SS316 Flange Guards.

Below We Will Discuss A Bit About Each Shield Material & The Type Of Flange Guards Made From It.


PTFE Flange Guards are made from multiple layers of PTFE coated fiberglass fabric. Layers of PTFE Fiberglass clothes are sewed together with the help of military grade Kevlar threads or PTFE Threads with a central scrim. The locking mechanism for PTFE Flange Guards involve industrial Grade Velcro & Heal Resistant Tie Strings

PP- HDPE Flange Guard :

HDPE – PP Flange Guards are made from Sheets of HDPE or PP. These Sheets are automatically cut with the help of machines. The locking mechanisms involve Nut Bolt & Strap locking with spacers across the surface of flanges.

SS316 Flange Guards :

SS316 Flange Guards are made from thick sheets. These sheets are then reinforced with layers of Wired Mesh to diffuse the pressure. The locking mechanism of these flange guards is double locking latch which can be quickly installed & uninstalled.