PT&P recently designed and manufactured six, PTP-4-160 type C variable springs with riser clamps for an oil refinery in Texas. These variable springs are constructed from carbon steel and designed to support loads of 6600 lb. with a total travel of 2″. The clamps are fabricated from A 387 Gr. 22 alloy steel to fit 18″ pipes. Dimensional and fit-up tests were performed on the variable springs and riser clamps prior to shipping.
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