Ball joints are used extensively for shipboard applications including oil platforms and drill ships. They are designed and qualified to ASME Class 2500 through 8″ NPS, and Class 900 through 12″ NPS. Fire tested to API 6FA, they meet ASTM F1298 shipboard piping specifications. Also they are approved by ABS Americas and Lloyd’s register.
Type N Style I Ball Joints
They have evolved from the original ball joints. Developed by Barco in 1908 to distribute steam from locomotives to passenger cars for heating. The Type N Style I was developed in 1960. Since that time thousands of Style I joints have been installed in steam, hot water and chilled water distribution systems, used to absorb tank and building settling, used for seismic isolation and many other piping applications to compensate for expansion or to add flexibility to the system. Type N Style I joints are available from 2 1/2″ through 30″ with proprietary Compound 11 composition seals or Compound 24 glass filled Teflon seals.
Type N Style II, III & III-V Ball Joints
They designed with injected graphite flakes with synthetic oil carrier, Grafoil® Flexible Graphite, that provides lubrication in addition to sealing. Grafoil® combined with a variety of high strength bearing materials results in increased temperature and pressure ratings. Seal options include Compound 11 non-metallic composition material, Number 21 ductile iron, Number 39 Alloy 625 high nickel stainless steel and Number 45 chrome-moly steel.
All Type N Style II, III & III-V ball Joints
They permit repacking with Grafoil® after installation. Packing of Type N Style II is accomplished with the system pressure removed and the installation of a Recharge Cylinder. The Recharge Cylinders are a permanent part of Type N Style III & III-V thus permitting repacking with the system operating. The Style III-V has the added benefit of a Safety Valve to completely isolate the system pressure.
Dannenbaum LLC can also help you with your Standard series Ball joint, OW1500 Ball Joints , and Series 3500 IS In-Line Seismic Expansion Joint.