Piping Technology & Products, Inc. fabricated 3-piece pipe clamps used to support 97" diameter stainless steel ductwork. This ductwork is being added to a refinery for an expansion project in Ponco City, Oklahoma. Each section of the clamp assembly is formed from a continuous plate and gussets are added at each of the bolt locations for increased strength and rigidity. Due to the ducts having a relatively thin wall, these clamps are designed wider than necessary in an effort to reduce localized stresses on the ductwork. The lower section of each clamp is formed to create a 150° cradle. This acts as a cradle by supporting the duct without inducing extra pressure, which might cause the duct wall to buckle or bend.
The upper sections are formed from ½" thick by 12" wide bar stock, whereas the lower sections are formed from ½" thick by 18" wide bar stock. All three sections are rolled to an inner radius of 48 ½" and the welded gusset plates are all ½" thick. The upper sections are formed at 105° each, and the upper load bolt is 2" in diameter while the six clamping bolts are 1 ½" in diameter.
The maximum load to be carried by these supports is 16,888 pounds. Each support will be used in conjunction with a variable spring support to accommodate movements as high as 2¼".
For additional information about this project, please visit us at www.pipingtech.com.