STANDARD SPECIFICATIONS
- Precompression – precompressing the spring coil into the hanger casing saves headroom by reducing the size of the casing, reducing the installed envelope size, and also weight and erection time.
- Closed-coil spring casing design protects the coil from damage and weather.
- Steel Construction – spring, casing, and internal parts are fabricated of steel making them rugged and compact. All welding is done to the strict requirements of ASME Section IX.
- The Piston Plate serves as a centering device and guide to maintaining coil concentricity under normal operating conditions.
- Load Indicators are visible in the slots and are clearly readable.
- Stainless steel nameplates and travel scales are corrosion-resistant.
- All spring hangers are calibrated for accurate loading conditions.
- The unit is preset at the factory to the Cold Load upon request.
- For each series, there is reserve travel at the upper and lower limits of the working range of the spring.
- Allowable spring coil stresses conform to ANSI/MSS-SP-58.
- Standard finish is a quality rust-resisting primer paint.
- A turnbuckle or other suitable coupling is utilized for the adjustment of rod-type spring units. F-type springs utilize an adjustable load column.
- All F-type units are supplied with a load flange.
OPTIONAL DESIGN FEATURES
- Travel Stop – set at the Cold load position changes the spring into a rigid support for hydrostatic testing or other purposes. The strength of the Travel Stop is designed so that it can withstand (up to) 2 times the normal load.
- Adjustable Travel Stop – allows the resetting of Preset/Travel Stop at any location within the normal operating range of the travel.
- Limit Stops – permanently installed to prevent the movement of the pipe beyond a predetermined distance or load within the travel range of the spring.
- Load Column Guide – for Type F units only, to prevent tipping of the Load Flange due to anticipated eccentric loading.
- Extended Load Column – for Type F units only, the length of the load column is furnished longer than normal per customer request.
- Lifting Lugs – are available in larger sizes to facilitate reception and installation.
- Hot-dip Galvanized Finish – available for protection against weather and corrosive conditions. The unit is galvanized to ASTM A-153 except the spring coil which is epoxy powder coated to assure protection to the coil as it flexes. The loaded column of the F Type spring is electro-galvanized. The maximum ambient temperature for the epoxy powdered coating is 350° F (177° C).
- Epoxy Paint Finish – available for protection against weather and corrosive conditions. The unit is painted with a two-part zinc-rich epoxy paint except for the spring coil which is epoxy powder coated.
- Stainless Steel Construction – allows the greatest degree of corrosion protection. Constructed completely of stainless steel except the spring coil which can be epoxy powder coated for economy.
REFER TO THIS CATALOG FOR DETAILED SPECIFICATIONS:
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