TPi May 2015

57 / 64

May 2015 Tube Products International 55
Stainless steel tubes
Steel pipes and fittings
Hebei Senhai Pipeline Co, Ltd is a
manufacturer and exporter of steel pipes
and fittings. The company is located in
Cangzhou City, China, about 120km
from Tianjin seaport and airport, and
180km from Beijing.
The company produces large diameter,
thick wall steel pipes by ERW, SSAW
and LSAW, and various anti-corrosion
pipes. Seamless steel pipes range in
size from 21.3 to 660mm, and 2 to
50mm wall thickness.
Square hollow sections and rectangular
hollow sections are available from OD
20 x 20mm to 600 x 600mm, in wall
thicknesses from 0.8 to 50mm. Anti-
corrosion of steel pipes includes 3PE and
3PP outer anti-corrosion layer; single
and double FBE layer anti-corrosion;
internal wall anti-drag coating of line
pipe; polyurethane insulating pipe; and
anti-corrosion by adding cement-and-
sand layer. Steel butt-welding pipe
fittings range in size from ½" to 72".
Hebei Senhai Pipeline Co, Ltd – China
The value of seamless stainless steel tubing
HandyTube Corporation, part of the
tubing division of Handy & Harman,
is a manufacturer of seamless coil
and straight tubing for oil and gas,
petrochemical and healthcare markets.
The company’s products are created
from hollow extruded tubes that are
passed through a process-intensive
manufacturing environment of drawing,
cleaning and vacuum furnace annealing,
resulting in high-quality seamless coil
tubing of various lengths and diameters.
The products are available in a variety of
high-performance, corrosion-resistant
alloys and sizes suitable for challenging
environments. The precision materials
division, added in 2006, broadened the
company’s capabilities to include smaller
diameter tubes, enabling HandyTube
to manufacture capillary and transport
tubing ranging from 0.51 to 25.4mm OD
(0.02" to 1"). HandyTube’s seamless coil
and straight length tubing is available in
multiple sizes, compatible with standard
fittings, and can be customised for
specific applications. Tubing is available
in many corrosion-resistant, high-
temperature and high-strength alloys.
HandyTube Corp – USA
New markets for stainless
steel finned tube heat
exchangers
Heat exchangers are used in many
industries, including the emerging
markets of fuel cell, waste heat
recovery and micro power generation
– all projected to be multi-million pound
worldwide markets in the near future.
With specific requirements to deal
with corrosive condensates and high
temperatures, the use of stainless
steel fins on stainless steel round or
elliptical tubes, including 5mm small
bore, challenges traditional matrix
manufacturing methods, to reach
required heat transfer requirements.
Power Fin Technologies is a UK-based
exporter of finned tubes and finning
machines. David Pierce, the company’s
owner and sole director, has been
in the heat transfer industry for over
40 years, and in that time he has
bought, managed and sold a number
of successful companies. He has also
developed and patented eight related
products.
Mr Pierce’s original patented linear
motor Elfin finning machine is capable of
mechanically bonding any two metals.
This produces an interference, swaged
fit between fins and tubes to form
a durable matrix, which extends the
surface area of the tubes to dissipate
heat or cooling more rapidly, without
deformation of the base tubes.
Infinity, the latest Power Fin machine
technology, uses the same process but
positions multiple fins at once. They are
claimed to be the only machines that
can join any two metals with precision,
using a clean, green process.
Stainless steel tubes are difficult to fin,
especially if they are elliptical, thick
walled, or micro bore tubes of 5mm or
smaller diameter. As the interference
fit is achieved by the fin, all sizes and
specifications can be accommodated
with ease. The precision of manufacture
also produces heat exchanger cores of
consistent performance.
Power Fin Technologies – UK