S-500 Threaded Closure
The Stark S-500 Threaded Closure represents historically the most widely used closure style in the oil and gas sector. Based on the industry’s desire for robust and cost-effective solutions, Stark improved upon the standard design to bring operation to a new level. Features to avoid hammering and strengthen operator control were incorporated into the otherwise proven design. The S-500 is manufactured in diameters ranging from 2” to 52” (DN50 to DN1300) and pressure series 150 through 2500.
BENEFITS
- Proven and robust design
- Economically priced
- Certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. II
- Flat sealing surface for best seal results on all sizes
- Bidirectional Hinge design allows the cap to open to the left and right side
STANDARDS
- 2” to 4” (DN50 to DN100) closures designed for wrench opening
- Opening tool supplied with 6″ to 52″ (DN150 to DN1300) closures
- PAV per UG-35.2 of ASME BPVC VIII DIV. 1 on 6” and larger (2” to 4” optional)
- Cap designed per ASME BPVC VIII DIV. 1, U-Stamp compliant
- Nace MR0175 compliant material
- -50° to + 400°F (-45° to 204°C)
OPTIONS
- Flanged Closure – welded connection or one-piece
- ASME BPVC VIII DIV. 1 with U-Stamp for whole closure (cap and hub)
- Opening Wrench for 2” to 4″ (DN50 to DN100)
- PAV per UG-35.2 of ASME BPVC VIII DIV. 1 on 2″ to 4″ (DN50 to DN100)
- Stainless Steel and Inconel weld overlay on sealing surfaces
- Custom Wall Thickness, vents, and other modifications
- Special Materials and O-Rings
- Horizontal, Vertical, Inclined or Declined hinging
