ENERGOTEROM is a private limited liability company based in Timisoara, Calea Sagului, no. 201. The main business since the establishment (March 1994), was the production of polyurethane foam pre-insulated pipes and elements. Thereby having a long experience and tracking trends on insulating materials, ENERGOTEROM Timisoara has increased its activity by introducing in 2007 the production of fireproof expanded polystyrene for thermal insulation and the production of EPS core sandwich panels and sandwich panels with mineral wool core for high temperature resistant roofing.
Our mission S.C. ENERGOTEROM LLC Timisoara is committed to "total customer satisfaction" in production, product development and service. Management is committed to training employees to provide total quality. Our mission is to deliver the best products for quality, in full compliance with customer requirements and performance criteria. In order to achieve our objectives and our policy in respect to quality criteria, ENERGOTEROM will provide efficient, economical and timely, meeting and even exceeding our customer requirements. This will be achieved through a continuing improvement program for operational procedures and system, striving to provide customers with "zero defects" products. Products and services offered by ENERGOTEROM will meet the customers wishes and specifications, in line with manufacturing standards. Management responsibility is to engage directly and provide the resources necessary to ensure continuity in accordance with these requirements. The most important part of ENERGOTEROM quality policy is to achieve excellence in products and services quality, offered as a result of collective effort and employees commitment. This commitment to "Quality" will be performed from production to service after sale. This Technical Approval for 'pre-insulated pipes and fittings for heating and heating networks', 01705 / 1905 - 2011, is valid until October 31, 2014.
Pre-insulated pipes
Durability
and Economy
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ENERGOTEROM mainly produces pre-insulated with polyurethane foam pipes and elements to DN 1000mm, is the only producer in the country for such diameters. With polyurethane foam, ENERGOTEROM runs thermal insulation and waterproofing for terraces, walls, industrial tanks, etc., constructing and installing indoor and outdoor heating systems, water polyethylene ductwork.
Describing the system polyurethane foam PUF serviceable pipe
coating
Pre-insulated pipes are built as a "pipe in pipe" structure. The inner pipe (serviceable) is chosen according to the nature of the fluid, the external pipe (protective coating) acting as thermal insulation, protection against external mechanical effects and preventing moisture from outside the insulation. The volume between the two pipes is injected with polyurethane foam. This system works as a whole, PUF (polyurethane foam) ensuring a good bond between the three components, they bear the same expansion under the action of heat loads. Pre-insulated pipes are joined by running a local isolation by applying a shrinkable sleeve of the same material as the protective coating, then PUF is injected, thus achieving a perfect tight thermal network from supplier to consumer.
Pre-insulated pipes Ţevi Preizolate Temperature range • on permanent request: -40 ° C to +150 ° C; • on temporary thermal stress: up to 160 ° C; • above 160 ° C, PUF is used in combination with mineral insulating material. Applicable areas Polyethylene coating: • buried pipes; • pipes mounted in sewers, indoors, where there is danger of flooding. Helical welded aluminum sheet: • pipes mounted on poles or supports; • pipes mounted in sewers, indoors. Employment Pre-insulated pipes are used to transport thermal energy: heating steam, hot water, thermal water transport, for corrosive environments, also in the oil industry, food industry, the serviceable pipe material (steel, copper, steel, polyethylene, polypropylene,etc..) is selected by the nature of the fluid. The serviceable pipe for the district heating system is made of: • galvanized pipe - to transport domestic hot water; • steel pipe - heat transport. Thermal insulation is rigid polyurethane foam with a minimum specific weight of 80 kg/m3. Convenience • insulation life: 30 years for an operating temperature of 160 ° C; • considerable reduction in heat loss (temperature variation is about. 1 ° C per network km); • the underground network no longer needs thermal concrete channel construction, pre-insulated pipes are buried directly in the ground; • shortens the construction time of the heating networks; • detection of possible damage by equipping the pipes with a surveillance system.
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Heat loss Heat loss for pre-insulated pipes can be calculated with this formula:
q=
T − Text [W /m] Di 1 D 1 4H 1 ln + ln + ln 2πλ iz d 2πλPE Di 2πλs D
€
where:
T = provider given temperature T ext = exterior temperature (ground, air) λ iz = insulation thermal conductivity at medium temperature λ PE = polyethylene coating thermal conductivity λ s = ground thermal conductivity d = exterior diameter of serviceable pipe D = exterior diameter of protective coating D i = exterior diameter of insulation (protective coating interior) H = laying depth of the pipe’s axis
Serviceable pipe diameter (mm) 34 48 57 76 89 114 159 219 273 324 419 508
Coating diameter (mm) 90 110 125 140 160 200 250 315 400 450 560 670
50°C 7.3 8.6 9.1 11.6 11.9 12.4 15.4 19.1 18.5 21.4 22.2 25.8
Specific heat loss q(W/mK) for provider given temperature of: 70°C 90°C 10.6 13.9 12.5 16.4 13.2 17.3 16.8 22.1 17.4 22.9 18.1 23.7 22.4 29.4 27.8 36.4 26.9 35.3 31.2 40.9 32.3 42.4 37.5 49.3
110°C 17.3 20.4 21.4 27.3 28.3 29.3 36.3 45.1 43.7 50.7 52.5 60.9
130°C 20.6 24.3 25.5 32.6 33.7 34.9 43.3 53.8 52.1 60.4 62.6 72.7
Pre-insulated pipes
Tm =
T + T0 2
€
For T = 90°C, T m = 55°C. λ iz = λ 55 = 0.027 W/mK For pre-insulated pipes laid directly in the ground, specific heat loss is given in the table above, with the following calculation hypothesis: soil temperature Text = 6 ° C; laying depth of the pipes axis H = 1m; moist soil, less tied λs = 1.2 W / mK.
Specific heat loss q(W/mK)
The figure shows a comparison of specific heat loss values between pre-insulated pipes, insulated with polyurethane foam, and ducts in a classical system, insulated with mineral wool, under the same conditions of temperature (90 ° C) and the same thickness of insulation.
PUF
Mineral wool
Pipe diameter (mm)
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Pre-insulated products
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Pre-insulated products Pre-insulated pipes are joined as a system in which the serviceable steel pipe and the hard polyethylene protective coating are connected by polyurethane foam with good adhesion properties and good resistance to compression. Under the action of thermal load, the three components support the same thermal longitudinal expansion thus reacting as a whole. General parameters • maximum operating temperature is 150 ° C (160 ° C on temporary request ); • delivery of straight pipes length is 6-12 m for long lengths of track; if required, pipes can be delivered shorter but not less than 1 m; • pre-insulated fittings with the same structure as pre-insulated pipe, have standard dimensions according to the classification of products; in special cases with extended arms Serviceable pipe • for heat transport we use steel pipes according to SR EN 10216-2 + A2:2008 or SR EN 10217-5/2003; • for hot water transport we use steel pipes according to SR EN 10255/2007; • on clients request we can have all types of pre-insulated pipes (PE, PPR, BY, PVC, etc.). The insulation material The foam insulation is rigid polyurethane, whose components are imported from Germany’s BASF Corporation, allowing steady operation of 150 ° C, accidentally 160 ° C, with a lifespan of 30 years, with the thermal conductivity coefficient of of 0027W / mK. Polyurethane foam injection is done under pressure, with the following properties: • closed cell content min. 88% • average density on pipe length 80 kg/m3 • compression resistance min. 0.3 N/mm2 • thermal conductivity coefficient tmed = 50 ° C max. 0.027 W / mK • pore diameter max. 0.5 mm
Pre-insulated products Protective coating • tough polyethylene of high density; • aluminum Spiro tubing. Strong polyethylene pipe is in accordance with SR EN 253/2003 and has the following properties: • density min. 935 kg/m3 • elongation at break (axial and radial)> 350% • a tensile elongation of 10% - axial 19.3 N/mm2 - radial 19.7 N/mm2 • MFR factor 0.3 - 1 g/10 min • maximum pressure of 2 bar For the development of pipe networking ENERGOTEROM delivers a wide range of pre-insulated products and accessories needed: -elbows -T-branch - Normal N - Parallel P -fixed point elements -reduction connectors -ball valves -connectors -expansion pads - installation pads and supports -pipe wall-crossing rings - warning tape
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1. Pre-insulated pipe - buried mounted with polyethylene coating
Domestic hot water Nominal diameter dn (inch) 1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4" 5" 6"
Exterior diameter d (mm) 21.3 26.9 33.7 42.4 48.3 60.3 76.1 88.9 114.3 139.7 165.1
Coating diameter D (mm) 90 90 90 110 110 125 140 160 200 225 250
lâ‚€ (mm) 150 150 150 150 150 150 150 150 150 150 150
Pre-insulated products
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Heat transport Nominal diameter dn (mm) 20 25 32 40 50 65
80 100
125 150 200 250 300 400 500 600 700 800 900 1000
Exterior diameter d (mm) 28 34 42 48 57 60 63.5 70 73 76 83 89 102 108 114 133 140 159 168 219 273 324 406 508 609 711 813 914 1016
Coating diameter D (mm) 90 90 110 110 125 125 125 140 140 140 160 160 200 200 200 225 250 250 250 315 400 450 560 670 800 900 1000 1100 1200
lâ‚€ (mm) 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 180 180 180 180 180 200 200 200
2. Pre-insulated pipe
- aerial mounted pipe with "Spiro" aluminum tubing coating -
Preinsulated pipe with aluminium coating Nominal diameter dn (mm) 20 25 32 40 50
65
80 100
125 150 200 250 300 400 500 600 700 800 900 1000
Exterior diameter d (mm) 28 34 42 48 57 60 63.5 70 73 76 83 89 102 108 114 133 140 159 168 219 273 324 406 508 609 711 813 914 1016
Coating diameter D (mm) 80 80 100 100 125 125 125 150 150 150 150 150 200 200 200 225 225 250 250 315 400 450 560 670 800 900 1000 1100 1200
lâ‚€ (mm) 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 180 180 180 180 180 200 200 200
Pre-insulated products
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3. Pre-insulated reduction - buried mounted with polyethylene coating Reductions have a composition identical to the pipe, it is used to make the connection between different pipe diameters.
Reductions (example) d₁×d₂ (mm) 25×20 32×25 32×20 40×32 40×25 40×20 50×40 50×32 50×25 65×50 65×40 65×32 80×65 80×50 100×80 100×65 125×100 125×80 150×125
D₁ (mm) 90 110 110 110 110 110 125 125 125 140 140 140 160 160 200 200 200 200 250
D₂ (mm) 90 90 90 110 90 90 110 110 90 125 110 110 140 125 160 140 200 160 200
L (mm) 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1100 1100 1100 1100 1300
d₁×d₂ (mm) 150×100 200×150 200×125 250×200 250×150 300×250 300×200 400×300 400×250 500×400 500×300 600×500 600×400 700×600 700×500 700×400 800×700 800×600 800×500
D₁ (mm) 250 315 315 400 400 450 450 560 560 670 670 800 800 900 900 900 1000 1000 1000
D₂ (mm) 200 250 200 315 250 400 315 450 400 560 450 670 560 800 670 560 900 800 670
L (mm) 1300 1300 1300 1400 1400 1600 1600 1800 1800 2000 2000 2000 2000 2000 2000 2000 2500 2500 2500
4. Pre-insulated elbow (90â °) - buried mounted with polyethylene coating These elbows have the same components as the pre-insulated pipe, produced with the requested angle.
Galvanized pipe elbows Nominal diameter dn (inch) 1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4" 5" 6"
Exterior diameter d (mm) 21.3 26.9 33.7 42.4 48.3 60.3 76.1 88.9 114.3 139.7 165.1
Coating diametru D (mm) 90 90 90 110 110 125 140 160 200 225 250
Arm lenght l (mm) 390 390 390 410 420 450 490 525 470 500 540
Pre-insulated products
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Black pipe elbows Nominal diameter dn (mm) 20 25 32 40 50
65
80 100
125 150 200 250 300 400 500 600 700 800 900 1000
Exterior diameter d (mm) 28 34 42 48 57 60 63.5 70 73 76 83 89 102 108 114 133 159 168 219 273 324 406 508 609 711 813 914 1016
Coating diametru D (mm) 90 90 110 110 125 125 125 140 140 140 160 160 200 200 200 225 250 250 315 400 450 560 670 800 900 1000 1100 1200
Arm lenght l (mm) 390 390 410 420 445 450 460 475 475 490 510 525 455 465 470 500 540 555 630 710 820 960 1095 1245 1400 1550 2350 2600
5. Pre-insulated branches - buried mounted with polyethylene jacket • Normal "N" branches
• Parallel "P" branches
• "T" branches
Pre-insulated products
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Normal "N" branches - identical pipe composition, branching at 45 ° Parallel "P" branches - same composition as the pipe, parallel branch to the base pipe. T" branches - same composition as the pipe, perpendicular branch Branches have serviceable steel pipe, are pre-insulated with rigid polyurethane foam and the exterior is protected with high density polyethylene coating. They are mounted as a joined system, directly buried in the ground. Delivery lengths: following the table below. Thermal insulation has embedded signaling system and track damage wire.
Branches (examples) d₁ × d₂ (mm) 32×25 40×25 50×25 65×25 80×50 100×65 125×80 150×100 200×125 250×125 300×150 400×150 500×200 600×200 700×250 800×250 900×250 1000×250
D₁ (mm) 110 110 125 140 160 200 225 250 315 400 450 560 670 800 900 1000 1100 1200
D₂ (mm) 90 90 90 90 125 140 160 200 225 225 250 250 315 315 400 400 400 400
L₁ (mm) 950 950 950 950 950 950 950 1200 1200 1300 1400 1650 2000 2000 2200 2300 2400 2500
L₂ (mm) 600 600 600 600 600 600 800 900 900 1250 1350 1500 1750 1900 2100 2200 2300 2400
H (mm) 200 200 210 215 245 270 280 325 360 400 450 540 615 660 750 800 850 900
Pre-insulated products
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6. Pre-insulated fixed point - buried mounted with polyethylene jacket Composition of fixed points is identical to the pipe, the pipe is used for reinforcing.
Fixed points (examples) d (mm) 20 25 32 40 50 65 80 100 125 150 200 250 300 400 500 600 700 800
D (mm) 90 90 110 110 125 140 160 200 225 250 315 400 450 560 670 800 900 1000
L (mm) 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800
7. Polyethylene connector Connectors are used to seal and insulate tubing joints.
Polyethylene (examples) dn (mm) 90 110 125 140 160 200 250 315 400 450 500 560 630
dâ‚ (mm) 103 120 137 151 170 211 260 325 411 462 512 572 642
dâ‚‚ (mm) 106 123 140 154 173 214 263 328 414 470 520 580 650
L (mm) 600 600 700 700 700 700 700 700 700 700 700 700 700
h (mm) 60 60 60 60 60 60 80 80 80 80 80 80 80
Pre-insulated products 8. Expansion pad - buried mounted with polyethylene jacket Expansion pad are used for taking valves dilatation, in the sections where there are changes in direction.
9. Preinsulated ball valves Can be manually or servo operated, with diameters ranging from DN 20 to DN 1000 mm, mounted by welding
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Handling, transport, storage • Pre-insulated pipes and elements must be protected from mechanical effects of collisions or static loads and transport must be conducted so as not to deform or deteriorate the pipes. • The pipes will be fixed against movement and shall not be transported with sharp objects that could damage the protective coating. Pipes can exceed the loading surface by 1m maximum, as prescribed by the movement and transport. The ends of pipes will be set against oscillation. In railway transport, pipelines will be fixed throughout their length to the transport surface, taking into account the requirements of railway. If transportation is long distance, bearing distance will not exceed 2m and the bearing surface must have a minimum width of 20cm. • Given the sensitivity of plastics to low temperature, below -5 ° C, loading and transport will be made with caution. • Raising pre-insulated pipes and elements will only be done with appropriate lifting devices (anchor straps at least 10cm wide shall be allowed). It is forbidden to use lifting ropes or wire rope without charge distributor because they can damage the protective coating. • Do not throw, roll, drag pipes and pre-insulated components. • Pre-insulated elements will be stored only on flat surfaces, with appropriate support. This will avoid the mechanical point loads due to uneven settlement, which could damage insulation. • The long term storage, of elements with protective polyethylene coating, in places exposed to the sunlight is not permitted because ultraviolet rays have a destructive effect on the coating and foam insulation can break down.
Pre-insulated Ţevi Preizolate products
Pipe siting • The trench must be built so that, if the diameter of the protective coating is below 200 mm, the distance between pipes and the distance between the trench and the pipes should be at least 150 mm. If the diameter is or exceeds 200 mm than the distance also needs to be at least 200 mm. Along the trench, polyurethane foam siting pads will be placed every 3 meters, on these pads the pre-insulated pipes will rest. The siting pads will be placed approx. 1 m away from the pipes end so that the connector can be fitted. These siting pads can remain in the trench when the work is done, they do not pollute and, at the same time, protect the pipes of the water in case of rain or infiltration, until 150 mm height. • Installing polyurethane foam siting pads can be replaced with wood siting pads with dimensions of 150 × 150 mm and length according to the trench width. Height of 150 mm can be achieved with 2-3 boards.
D b₁ b₂ h₁ h₀
<200mm>200mm 150mm 200mm 200mm 200mm min. 150mm min. 800mm
• After the local insulation and the sand bed are done, the wood sitting pads can be removed. The ditch grit is achieved only after local insulation is completed and the delivery of the working surface based on official report of hand over-take over. The grit of the sand bed is 0.3-2 mm (washed sand) and only 3% can contain granules of 10 mm. Clay and silt content of sand can not exceed 2%. Do not use fine sand or sand and silt content higher than that prescribed and is not normally allowed to cover the pipes with earth. By compacting the sand layer we must obtain a soil density of 80-85%. Informatively, the depth of laying the pipes, that withstand without damage the temporary duties owed by motor vehicles, is 0.8 m. • In case of constant traffic of vehicles, minimum laying depth is 1 m. • Different network related constructions (homes, fixed points anchor blocks) will be executed before starting local insulation work. In each case the concrete walls of the homes will have wall cross-
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ings installed. If home execution is not prescribed dry, it is sufficient a crossings of other pipe internal diameter greater than 20 mm diameter casing protection and length of approx. 400 mm. If dry homes are requested, then rubber wall crossing rings will be mounted, provided by ENERGOTEROM. • Fixed points frames made of I and U profiles are mounted in concrete. They should be laid collinear. Corresponding to the siting, digging a single hole for the concrete block foundation is allowed. Welding the fixed points discs will be made only after complete reinforcement of concrete block.
Execution of pre-insulated networks Execution technology includes the following phases: Siting It is forbidden to support pipes with stones, bricks, pieces of metal. Maximum angle deviation is 3 °, above this value pre-insulated elbows will be inserted. Place the pipes on siting pads, pull the plugs on the ends of the elements. For the signal wired networks, pipelines must placed so that the thread is placed on top. Protective caps at the ends of pipes must be removed just before the start of welding, so dirt doesn’t get in ductwork. Welding During welding protecting the pipe is required to avoid damaging the insulation and its protective coating. The frame of the fixed points disc is reinforced by concrete, homes for sluices are made, pressure testing is performed, the supplier is informed about the completion of works in order to start the work on local isolation, ending the record of the pressure test, expansion pads are installed. At each expansion point (£, clearing "L", "Z") expansion pads of expanded polyethylene must be mounted. Expansion pads are mounted to cover the whole surface of the protective coating, on straight sections and around the outside bend of the elbows. Coverage Cover with sand in order to achieve a thick bed of sand and coverage of 150 mm. At the edge between sand and earth a warning tape marked "pre-insulated pipes” should be placed. For final coverage use compacted land. Proper compaction is 75-80%.
Pre-insulated ลขevi Preizolate products Observation When pre-insulated straight pipes are cut on site, signaling thread must be protected, so that the wire is cut to be longer than 15 cm from the free end of the insulation. The segmentation of pre-insulated elements (bends, branches, etc..) is strictly prohibited. If the underground network is continued to surface, connecting the underground network with the surface one, another polyethylene pipe will be installed to protect the coating of the pipe supporting the surface network one which must rise at least 50 cm above the ground.
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Insulation and protection works
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Mineral wool shells are used in insulating underground and aerial pipes. They have a cylindrical split along generatrix. Can be produced strip or laminated with aluminum foil. Also, these products can be reinforced by polyethylene fabric, zinc, aluminum sheet, to achieve a more effective mechanical protection. In thermal points, for example, pipes may be isolated with basaltic mineral wool, up to a diameter of 350 mm with shells, and for a larger diameter with wool mattresses. Insulation protection is made with aluminum sheet. Datorită formei lor, izolarea termică a conductelor devine foarte simplă, iar în cazul unor intervenţii întâmplătoare, izolaţia se poate desface şi repune fără deteriorarea acesteia. Because of their shape, insulation of pipes is very simple, and in case of accidental interference, insulation can be opened and restored without damage. Diameter range of manufacturing is from 18 mm to 350 mm, with 20-100 mm thickness
Insulation and protection works
Characteristics of basaltic wool shells: Basaltic wool shells Lenght (mm)ip pernă Interior Diameter (mm) Wall thickness (mm) Medium density (kg/m³) Maximum serviceable temperature (°C) Maximum thermal conductivity (W/mK) - la 10° C - la 100° C Flammability
1000 18 - 350 20 - 100 70 - 90 350 0.035 0.046 Fireproof
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Polyethylene water pipes
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PE pipes can be used for water supply networks, irrigation networks, fire-fighting network, etc.. Depending on the scope, PE foam pre-insulated pipes can be produced. Pipe connection is made by head to head welding with thermoboard or electrowelding-socket.
Welds are performed only by qualified and certified personel for this type of welding. In S.C. ENERGOTEROM LLC operators are certified by the company producing the machines (WIDOS) and ISCIR.
Preheating and welding pressures, respectively preheating times, welding and cooling are calculated for each pipe diameter and pipe wall thickness. These parameters are given and are tabulated at each workstation. Control is carried out by continuous monitoring of process parameters and their inclusion in observation charts polyethylene welding parameters.
Polyethylene Ţeviwater Preizolate pipes High density polyethylene welding fittings
High density polyethylene fittings are made by head to head wealding. Welding equipment is used as follows: - Head to head welding machine - WIDOS 4002 - for pipe diameters between 90 mm D - D 355 mm; - Head to head welding machine - WIDOS 8000 - for pipe diameters between 400 mm D - D 1000 mm. ENERGOTEROM executes high density polyethylene elbows at various angles, as follows: 1. elbows at 15 °, 30 °, 45 °, 60 ° - in the range D 90 - D 1000 mm; 2. elbows at 90 ° - in the range D 90 - D 1000 mmm; 3. "T" - sites equal - in the range D 90 - D 355.
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Adress: Calea Ĺ&#x17E;agului, nr. 201, cod 300517, TimiĹ&#x;oara Telephone: 0256 - 217081 Fax: 0256 - 217082 E-mail: ett@energoterom.ro URL: www.energoterom.ro