Multiple tube cleaning pig featuring replaceable disks anchoring

Details Multiple tube cleaning pig featuring replaceable disks anchoring Multiple tube cleaning pig featuring replaceable disks anchoring

1998-02-03

2000-01-18

Warden, Sr., Robert J.

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

15104061, B08B 904

Patent

active

06014789&

ABSTRACT:
The present disclosure is directed to a pig for cleaning thin wall tubes in a heat exchanger which are subjected to internal deposits which become very hard with heating during use. The pig comprises an elongate central mandrel between front and back end pieces and supports a structurally defined carefully positioned disk. The disk in turn has a plurality of radially directed tapped holes evenly spaced therearound and the holes enable threading of a set of headed bolts in them. The length of the bolts is precisely controlled so that the outer exposed tip of the bolt head contacts the tube to scratch the interior to break the hard deposits without denting the surrounding tube.

REFERENCES:
patent: 3673629 (1972-07-01), Casey et al.
patent: 4244073 (1981-01-01), Sagawa
patent: 4767603 (1988-08-01), Byrd et al.
patent: 4907314 (1990-03-01), Kershaw
patent: 5035021 (1991-07-01), Le Devehat
patent: 5150493 (1992-09-01), Sivacoe
patent: 5265302 (1993-11-01), Sivacoe
patent: 5400456 (1995-03-01), Skibowski

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