TPT January 2011

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78 January 2011 ›
Straightening & Finishing
PIPE Ltd is a manufacturer and supplier
of specialist pipework fabrication tools
and handling equipment for workshop or
on-site environments. The company’s range
of portable precision pipe preparation/
bevelling machines and portable pipe cutting
equipment is used in industries including
chemical, oil, gas and power generation.
The company also supplies an extensive
range of pipestands, pipe handling, rapid
pipe welding alignment clamps and spider
internal alignment clamps used for set-up in
all types of pipework fabrication.
PIPE Ltd manufactures various models of
ID locking pipe bevelling machines ranging
from ½" to 20" ID, along with various models
ASMAG, Austria, a supplier to the steel and
non-ferrous metals industry, has developed
a new multi-roll straightening machine
for steel tubes for Wiederholt GmbH,
Germany.
The 10-roll-straightener – branded
type RRM-pro 125/420/10 – works up to a
maximum tube outside diameter of 125mm,
at a line speed of 180m/min.
To achieve the best accuracy in
straightness, a new drive system was
developed to reduce the roller centre
distances to a minimum. The individual high
efficiency AC servomotors enable roll wear
compensation and high dynamic process
control.
A further feature of the machine is the
identical design of the vertical and angular
adjustment of all ten rollers. In association
with additional adjustments on the inlet
and outlet troughs, the first and fifth pairs
of rollers can be fully integrated into the
Pipework fabrication tools and equipment
Multi-roll straighteners for tubes
of OD mounted split frame clamshell pipe
cutting and bevelling machines ranging
from 1" to 60" diameter pipe.
The bevelling and cutting machines in
PIPE Ltd’s range are capable of producing all
of the standard weld preparations required,
ie V-preps, J-preps and borematching on
mild steel, stainless steel, duplex, super
duplex and Inconel wrapped pipes.
PIPE Ltd also manufactures a range of
pipe clamps, both ID and OD mounted, with
models dedicated to reforming pipe to get
the perfect alignment.
The company has been supplying
equipment for the purging of stainless steel
pipe for many years, and has recently
tube bending/ovalisation process. The
centreline of the machine can be changed.
The vertical adjustment of each roller is
performed by hydraulic cylinders controlled
by servo valves; each roller is limited in
load by limiting the pressure in the hydraulic
cylinder. Together with direct measuring
by absolute encoders, clearances in the
system are eliminated.
With the new ‘Realtime Setting’
straightening mode, adjustments are not
restricted to the time period before and after
a cycle. This mode has already been proven
on the ASMAG 2-roll-bar straightening
machines, and allows adjustments during
the straightening process in real time. The
mode also enables different settings for
tube rear end, front end and the remaining
tube, if necessary. For this purpose the
drives of the high dynamic controlled vertical
and angular adjustments of the rollers are
designed and calculated to suit challenging
straightening loads.
The straightening
machine is part of a
fully automatic drawing
line for welded tubes,
incorporating pointing,
drawing, tube rear
and front-end cutting,
straightening, ultrasonic/
eddy-current testing
and multiple cutting
equipment.
Asmag GmbH – Austria
Fax: +43 7616 8801 44
Email:
Website:
introduced the latest ‘Triple Seal’ purging
systems, designed to reduce both gas
usage and purging times. The range starts
from 1" with made-to-order special models
available for up to 40" ID.
PIPE Ltd has recently become the UK
distributor for the aquasol range of purging
equipment, including the E-Z Purge water
soluble dam system, the E-Z zone and E-Z
wipes industrial cleaning wipes to remove
dirt and dust particles prior to application.
PIPE Ltd – UK
Fax: +44 1869 323273
Email:
Website:
High quality rolls
THE cold straightening process can be
applied to many products including
longitudinally welded or seamless tube
and steel bar, sections and rails. The rolls
used in the straightening processes must
possess high hardness and wear resistance
characteristics whilst also offering the lowest
possible tendency to pick up.
Rolls manufactured from forged Märker®
cold work tool steels are highly suited to
these applications. The breaking rolls are
of a one-piece design and made from pre-
heat treated and stress relieved Märker®
Zesek. In order to improve the resistance of
these rolls, they can be surface hardened
in a special hardening process (depth of
hardness: approximately 10-15mm). This
enables the production of rolls with a hard
wearing surface and tough core.
For some applications, composite rolls
are offered as a two-part design. In this
instance, the working part of the roll is the
shell manufactured in Märker® Zesek, fitted
to a shaft constructed from tough heat
treatable steels.
The Schmidt + Clemens Group supplies
a full range of high precision roll products for
many applications from its manufacturing
plants in Germany and the UK. The
complete in-house service includes in-depth
technical advice on rolls, roll refurbishment,
manufacture of rolls to samples, design
(rolls for production of tubes and cold rolled
sections) and development.
S+C Märker GmbH – Germany
Fax: +49 22 66 92 509
Email: –clemens.de
Website:
ASMAG’s straightening machine