Determining Fitting Positions on Polyethylene Tanks

Polyethylene tanks are able to accommodate a wide variety of fittings and locations of fittings.  This flexibility allows for proper inputs and venting, ensuring a safe, considered solution for a given chemical.  A common point of confusion that we hear from customers is: Which fittings can I use on my tank, and where can they be installed?  We've tried to simplify the answer to that question by considering each area of the tank and the corresponding compatible fittings. 

Let’s take a look at the fittings for polyethylene tanks that can be installed in various areas of the tank.

There are several different types of fittings available for your tank: Ball dome self-aligning, bulkhead, bolted flange, B.O.S.S. Fitting®, made vertical fitting.  Only certain fittings can be added to parts of the tank depending on the surface area shape and size.

Top dead center – UBDs both flange and bulkhead  style, Made Vertical fitting, and in some cases a bulkhead or standard flange can be used. To determine this, we recommend you work with our inside sales team.

Curved dome sections - Limited to UBDs both flange and bulkhead style and Made Vertical fitting.  See the guide below to determine the maximum size fitting based on the curvature of the dome.

Flat dome locations – 5 types of fittings can be added here. Flanges, Bulkheads, Spooling fittings, UBDs & Made Verticals

Sidewall – A few types of fittings can be used on the sidewall.  Bolted Flange, Bolted Spool, the B.O.S.S. Fitting® and Bulkhead fittings

To determine what size fittings are available based on the area of installation, download our reference chart or contact a chemical storage expert if you have any questions.

Talk to a chemical storage tank expert

Topics: Fittings and Accessories