U-Tubes & Tube Bending
TPS does not only produce and stock straight seamless and welded tubes. We also manufacture U-Tubes for use in heat exchangers, condensers, pre-heaters and other applications. These U-Tubes are made in accordance with requirements of TEMA RCB-2.31, ASTM A / ASME SA 688, DIN 28179, ASTM B / ASME SB 163, other statutory requirements or specifications.
Besides the classic U-Shape, we can also supply more complex and individual tube and pipe bendings for a wide range of applications.
5 excellent reasons to buy U-Tubes from TPS
You save money and time
• You only have one contact person
• You avoid transport damages to the long initial tubes on the way to the bending
company
• You do not have to pay extra costs for the carriage to the bending company
• You benefit from time savings due to the parallel production of the initial tubes and
the U-tubes
• You may request spare tubes, which we stock for you
• You save space and time for assembling the heat exchangers as the U-tubes can be
removed radius-wise from the wooden combs
High surface Quality
• You receive tubes which are free from oil and grease as well as free from debris
• You receive a metallic bright surface without discolouration on the inner and outer tube
Professional heat treatment of bending area
• You can choose between solution or stress relief annealing depending on the material
standard
• On demand, we also include the annealing charts
Highest Quality
• You receive a detailed test certificate with all the important measures of the bend along with
the inspection certificate 3.1
• You are given a warranty of up to 3 years*
* In line with our general terms and conditions of sale we guarantee defect free materials and
good workmanship
Safe and smart packing
• The U-tubes are secured to the transport-rack using wooden combs in order to avoid damage
• Your incoming material inspection is faster and more efficient due to the accurate packing
sorted by radius
Detailed information regrading the heat treatment procedure of bending area
• According to the German regulation AD-Merkblatt HP7/3, U-Tubes with a radius > 1,3 D
are usually not subject to heat treatment after bending. Should a heat treatment be required,
it has to be agreed before order placement.
• Before the heat treatment of the tube, its surface in the zone that will be annealed is going to
be cleaned in order to remove any residue.
• The bend and maximum 300 mm of the leg will be heated to material-specific temperature
through an electric resis-tance heat treatment. The measurement of the temperature is going
to be accomplished by an automatic infrared camera. The tube interior is going to be rinsed
with protective gas to avoid oxidation. A light oxide layer is permitted according to ASTM
A688.The discolouration on the outer tube surface will be me-chanically removed on
request
• Solution annealing:Heating to a temperature according to the material specification,
followed by rapid quenching.Stress relieving:Rapid heating to a temperature between 550 –
650°C, followed by slow cooling in still air.
Emergency shutdown service
U-tubes within in days – instead of months!
The wide stock range which includes all common material grades and dimensions, in connection with our special stock service guarantees a delivery „just in time“.
The U-tubes are manufactured in our own bending facility within a short time.
Therefore, they can be delivered at short notice based on the stock material.
You can order U-tubes in the following material grades* :
• Stainless steel
• Nickel alloys
• Titanium
• Carbon steel
• Low alloy steel
• Aluminium brass
• Admiralty brass
• Copper-nickel alloys
In addition to the production of straight seamless and welding tubing TPS manufactures U-Tubes for use in heat exchangers, condensers, pre-heaters and other applications. These U-Tubes are made in accordance with requirements of TEMA, ASTM A 688, DIN 28179, our Technical Delivery Conditions TDC-01, other statutory requirements or specifications.
Beside the production of U-Tubes TPS is also specialised in the delivery of individually conceived tube and pipe bendings for a wide range of applications.
6 excellent reasons to buy U-Tubes from TPS
1) Saving time and money due to In-House Bending
Tube production and bending in one facility. No need to transport tubes from manufacturer to the bending shop an from there to the fabricator. This eliminates also the additional transportation costs for the long length straight tubing.
Furthermore there is a considerable saving of time due to In-House Bending, because bending process can be started immediatly after the first straight tubes have been rolled.
2) User friendly packing methods
The pre-sorted packing methods in rows or layers and sorted by radius will allow quick and easy removal of the tubes either from top row by row or from the box end by layers. This will save you space, time and money.
3) Spares
We keep spare tubes of longest developed length in our factory during the time of assembling the tube bundle. This spares can be bent with correct radius and be delivered against actual freight rate.
4) Cutting Allowances
Have you ever noticed how other suppliers charge you for the cutting allowance? TPS only charges the actual quantity shown on the bending schedule.
5) Heat Treatment of Bending Zone
We have all necessary equipment for the heat threatment after bending of bent area plus approx. 300 mm of each straight leg length by solution- or stress relieve annealing.
The discolouration on the outer tube surface can be removed on request by mechanical or chemical means. (see ASTM A 688)
6) Quality Assurance
The U-Tubes supplied by TPS are subject to the same strict quality assurance requirements as the straight tubes and we grand full waranty for the bending area also.
