Category Archive

Modifying Service Conditions in Rubber-lined Vessels Frequently we receive inquiries regarding the practice of switching chemical services in rubber-lined vessels. The reasons vary and need not be discussed here. The following statements are offered to prevent problems which may be encountered with such practices.

Lining Life of Rubber Linings In Bleach (NaOCl) Service The life expectancy of any rubber lining is very difficult to predict and relies heavily on historical performance records. There are a number of variables that affect performance most of which are outside the control of either the manufacturer or installer. These include but are not limited to:

Hydrofluoric Acid and Related Chemicals by: John Rabb Fluorine (symbol F) is the smallest atom in existence. It does not exist in nature as the fluorine atom but generally as stable, insoluble salts such as calcium fluoride (fluorspar or fluorite), sodium aluminum fluoride (cryolite) and calcium fluorophosphates (fluoroapatite) which is a significant source of phosphate for the fertilizer industry as …

Abrasion Resistant Liner Facts

HYDROCHLORIC ACID STORAGE TANK – RUBBER LININGS Hydrochloric acid (hydrogen chloride), or as once named muriatic acid, is a strong, highly corrosive acid. The commercial concentrated or fuming acid contains 38% hydrogen chloride. U. S. P. grades range from 28 to 38%, with 37% HCl being most common.

Rubber Hardness and Durometer Testing and Measurement — Black Art or Science? Scarcely a day passes without someone posing a question to our technical department regarding rubber hardness and durometer testing. The nature and frequency of these questions indicate that the term “rubber hardness” is largely misunderstood. The following is being offered in hopes of clarifying these misunderstandings.

What are the Three T’s for Tank Lining?   So many lining projects end up with defective conditions associated with the three T’s.   To me the three T’s are Technique, Time and Temperature.   Following are examples of what conditions can exist and they are not difficult to prevent with proper project planning.

Chemical Activation – Chem Cure Recently, we’ve been doing experimentation on ways to enhance viscoelastic stiffness and bond in gum natural rubber thereby minimizing flow and/or sag. Sometimes one needs to assemble a thick section of gum rubber by layering up four or more 1/4″ plies of gum rubber to 1″ thick or heavier. In laboratory trials, we have found …

Rubber Gasket Use Frequently questions arise regarding the proper selection, use and handling of gasketing materials. Unfortunately these questions tend to emerge after a gasket has failed in service. It must be remembered that a gasket is much more than a spacer which can take all types of abuse and still function as intended. Generally, a gasket is to be …

Strategic Global Growth Leads to Blair Rubber Expansion Seville, Ohio – Blair Rubber Company leaders celebrated the groundbreaking of its manufacturing and headquarters’ facility expansion on Monday, June 16. “This is truly a special day for our company, the community and our customers worldwide as we break ground to expand our facilities to accommodate our consistent and steady growth”, said …