Cut Sheet

Pipe Straps, Conduit Clamps & Hangers
D-33
Metal Framing, Pipe Hangers and Accessories
GoldGalv
®
Outperforms Copper Plated
In a test conforming to ASTM G-87-84, also known as the Kesternich Test, Superstrut’s GoldGalv
®
electrogalvanized zinc dichromate finish achieved superior corrosion resistance in comparison to copper plated.
Performed and certified by an independent testing laboratory, the stringent Kesternich test is equivalent to an
acid rain environment. The test procedure exposes subject material to condensed moisture containing harsh
sulfur dioxide (S02) which accelerates the aging process. During the series of test time cycles, the material
is thoroughly inspected for signs and progression of damaging red rust.
The first test series conducted included various light-duty adjustable clevis hangers assembled to copper
tubing. The GoldGalv
®
finish exhibited five times the red rust resistance as compared to copper plated.
The second test series was performed on various O.D. pipe straps attached to copper tubing and
continuous slot channel. GoldGalv
®
achieved greater red dust resistance by seven times over copper plating.
Once tests were completed, all copper tubes were split open and inspected for signs of electrolysis. The
copper tubes showed minimal deterioration as a result of the test and no indication of electrolysis occurrence
when attached to material with GoldGalv
®
finish.
ASTM G-87-84 Corrosion Test Results
INITIAL 50% 100%
FINISH RED RUST RED RUST RED RUST
Test Series I: Light-Duty Adjustable Clevis Hanger
GoldGalv
®
120 hours 216 hours *Never obtained
Copper Plated 24 hours 48 hours 72 hours
Test Series II: O.D. Pipe Straps
GoldGalv
®
168 hours 192 hours 240 hours
Copper plated 24 hours 48 hours 168 hours
*Test series ended after 360 hours.
Standard Finish – GoldGalv
®
, unless otherwise stated.
GoldGalv
®
hardware finish is standard for all Superstrut
®
products. This is a multi-process finish of
electro-plated zinc, followed by gold-colorized zinc dichromate to give excellent corrosion resistance
and a superior paint base. See page D-3 for a complete description of the GoldGalv
®
hardware
finish. GoldGalv
®
hardware will be furnished if no other finish is specified.
Materials
Most products are manufactured from hot-rolled carbon steel bars or hot-rolled strip steel.
Pipe rollers are cast iron. Products which are copper plated carry the letter “T” in the prefix.
Design Loads
Where design loads are indicated, they provide for a safety factor of 3 in conformance
with the “AMERICAN STANDARD CODE FOR PRESSURE PIPING.”
Hanger Design
Pipe hangers are of advanced design and afford a new and better way of ordinary use.
Standard Dimensions
The following, except where noted, apply to all beam clamp fittings.
Hole Size:
9
⁄16" diameter
Material: 1
5
⁄8" wide
Material:
1
⁄4" thick
Excellent Corrosion Resistance and a Superior Paint Base