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Table 3
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Special notes: Treat upper and lower connections as any tool joint connection and inspect and repair them in the same manner. The center connection has a special thread designed for special service conditions, It should normally never need service due to infrequent make up and break out for inspection and maintenance. The center connections have a primary elastomer seal (O-ring). The shoulder of the connection serves to close any gap that might allow extrusion of the elastomer seal, and to provide a torque shoulder for the joint. A visual inspection should reveal no raised galling or groove across the contact shoulders. Inspect the threads of the connection in the same manner and to the same standard as used for the end connection threads. Verify center connection seal integrity by hydrotest after each teardown and reassembly. If the center connection ever needs rework, return it to WOODCO USA. Certain small size WOODCO USA IBOP's do not have replaceable seats. If wear (fluid cutting) or rust pitting occurs on this integral seat, return it to WOODCO USA for refacing, or re-work it by referencing Figure 10 (see page 11). Do not attempt to substitute parts manufactured by anyone other than WOODCO USA as malfunction or severe damage under pressure may result. DO NOT WELD ON OR APPLY HEAT TO ANY PORTION OF THIS PRODUCT!
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