MAGNATECH Pipeliner II 609A, Operating And Maintenance Instruction Manual

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10.0 ADAPTOR FEET KITS FOR PIPELINER GUIDE RING TO ALLOW USE ON
SMALLER PIPE SIZES
The standard guide ring uses square aluminum tubes 25mm (1”) high which are the
component which contacts the pipe OD. There is a number of reasons and situations
why you might want to adapt this guide ring to a different size of pipe. You would do this
by attaching additional square or rectangular metal tubes on each of the square
standard tubes. We can provide an additional 25mm (1”) square tube or a 50mm (2”)
rectangular tube. In some case, however, the pipe sizes are not in even increments or
1” or 25mm or it might even be a special non-standard size. In this case, we have to use
a combination of the square or rectangular tube, and a flat metal spacer shim to
accommodate the specific pipe OD. It is not possible to use the spacers/adaptors on
only some of the square tubes. They have to be applied to each and every square tube.
(See Drawing 103040 Guide Ring Assy Friction Drive)
There is a number of reasons why someone might wish to adopt a guide ring to a
smaller size pipe. These are:
10.1 To save cost. A given guide ring can be used on pipe up to 125mm (5”) smaller
in size by using adaptors. This is a less expensive than buying additional guide
rings. This is not a good solution, however, for a customer that is changing pipe
sizes frequently as it takes some time to screw all the adaptors onto the existing
square tubes or subsequently remove them.
10.2 To allow use of a standard guide ring on a special non-standard size of pipe.
While Magnatech has the capability of engineering a guide ring for any size, we
would charge additional for that service. In most cases, the additional radial
clearance is not significant and the customer could use the next size larger
standard pipe guide ring with adaptors.
10.3 For applications where the weld Head must be used on preheated pipe. For
some pipe materials and applications, a relative high preheat temperature must
be used which may have to be maintained during the entire duration of the weld.
To avoid damage to the Head, it is beneficial to create more air space between
the weld Head and the pipe OD. This can be done with the adaptor/spacers. In
addition, sometimes this preheat is done using resistance coils which are
wrapped around the pipe. By raising the weld Head off the pipe surface, there is
enough room for these heating coils.
The reason that a universal adaptor set to cover any situation is that every size
guide ring has a varying number of the standard square tubes - the larger the
guide ring size, the greater number of tubes. There are also four distinct
situations:
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A situation where the pipe size is close enough to the standard that a
25mm adaptor for tube cannot be used and only a flat metal “shim” can
be used which must be machined to the correct height at Magnatech.
!
The situation where the customer wants to weld a pipe exactly 2” smaller
(or two times 25mm) in size, in which case one additional square tube is
used.