| 摘要 |
1504657 Flush mounted pipeline corrosion probe PETROLITE CORP 2 June 1976 [14 June 1975] 22817/76 Heading G1N A corrosion probe is provided for flush mounting into a nipple secured to a pipeline. The :nipple 12 has a first, smooth walled portion 17, an abutment 18 and an internally threaded portion 19. It surrounds a hole 16 in the wall of pipeline 13. The probe has a cylindrical metallic body 11 with a terminal planor surface including electrodes 28, 29 and insulating material 31, 32 at one end. Exterior threads on the body engage the nipple threads 19. Sealing means 47 encircle the body and form a fluid tight seal with the smooth walled portion 17 of the nipple. Stop means on the body engage abutment 18. Terminals, connected via leads 36, 37, 38 to the electrodes 28, 29 and the body are located at the end of cavity 23c, coaxial with the body which extends to the other end of the body. Indexing means 44 is located adjacent the terminals and the cavity 23c is of polygonal cross-section for engagement by a rotary driving tool. Groove 51 is provided for engagement by a latch on a driving tool and the probe may be secured to the nipple by set-screw 52. A connector 63 contacts the terminals and is held in place by screw 59 engaging cap 57. Clip 64 is to prevent ejection of the probe body by pressure in the pipeline. The electrode connectors 36, 37, 38 are encapsulated in insulating material which, together with contact 39 forms a rigid body, held in place by abutment to step 26. Electrode 29 is preferably annular and the test electrode, 28 being the reference electrode and the end 27 of the body, the auxiliary electrode. |
