Article Abstract:
Underwriters Laboratories Inc (UL) has come up with a unified process to test and certify plumbing products for performance, health effects and life-cycle standards. The effort is intended to minimize the certification process for these equipment, which previously received separate certifications for every product type. The move also entailed the creation of a full range of laboratories, testing procedures, equipment and expertise in the past two years.
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Article Abstract:
Northbrook, IL-based Underwriters Laboratories is investigating a class of fire sprinklers, with O-ring water seals, that may be defective. Models with O-ring water seals may leak or become inoperable in a fire since they need a higher water pressure than is normally available in buildings. The testing of about 90 samples has suggested that around 20% of this type of sprinklers did not operate at a water pressure of 5 lbs per sq in nor at 7 psi.
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Article Abstract:
A list of companies offering engineering software packages is provided. The list is subdivided according to the type of software, from AC analysis software to wiring design software. The corporate address, telephone numbers, facsimile number, electronic mailing address and Web site of each company included in the list are provided in the manufacturers index of this issue.
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