Utilizator nou

Instalatia de incalzire: cupru sau polipropilena?

de Constantin Stefan , 04 noiembrie 2010 , 7007 afisari

In cazul instalatiilor ingropate in pardoseala, se recomanda polipropilena, pentru ca este mai groasa si rezista mai bine la presiunea exercitata de o sapa din beton. In cazul in care se folosesc totusi conducte din cupru, ele trebuie izolate. In situatia unei montari aparente insa, conductele din polipropilena, cu aspectul lor masiv mai ales in zonele de imbinare, prezinta un net dezavantaj estetic in comparatie cu conductele din cupru.

Deci, in cazul in care optati pentru o instalatie de incalzire din polipropilena, trebuie sa luati in calcul si realizarea unor masti pentru conducte. Pentru acestea, se pot folosi cu succes profilele metalice si placile din gips-carton. In ceea ce priveste costurile, pentru doua instalatii similare, executate din cele doua tipuri de materiale, cuprul este cu 20% mai scump.

La aceste procente se mai adauga si costurile materialelor suplimen­tare, necesare pentru sudura. Acestea sunt: pasta decapanta (necesara pentru curatarea suprafetei de sudura), cositorul si buteliile cu gaz, cu ajutorul carora se realizeaza sudura. Din punctul de vedere al randamentului, conductele din polipropilena sunt mai eficiente. Ele nu pierd caldura, coeficientul de transfer termic fiind foarte mic. In cazul cuprului, coeficientul este mai ridicat.

Neajunsul acesta se poate ameliora simtitor printr-o buna izolatie a conductelor. Izolatia are si rolul de a feri cuprul de abur in incaperile in care acesta exista (baie, bucatarie). In aceste spatii si in lipsa protectiei, conductele din cupru se oxideaza, fenomen care nu apare, evident, in cazul polipropilenei.

Un alt avantaj al acesteia este rezistenta la coroziune chimica mult mai ridicata decât in cazul cuprului. De aceea, conductele de polipropilena sunt recomandate in cazul conectarii instalatiei la sistemul centralizat de termoficare, deoarece in acest sistem (exemplu: RADET) curatarea conductelor se face cu substante chimice. Exista o serie de caracteristici similare ale celor doua tipuri de materiale. Dintre acestea mentionam faptul ca timpul de lucru este egal.

Pentru un apartament de aproximativ 60 mp, realizarea instalatiei se face intr-o saptamana, indiferent de materialul folosit. De asemenea, ambele materiale nu fac depuneri in interiorul conductelor, spre deosebire de otel si fonta. O alta calitate a celor doua materiale consta in faptul ca fitingurile nu reduc diametrul tevii. Din acest motiv nu apar pierderi de sarcina, iar presiunea asupra imbinarii se reduce.

Comentarii

  • crorkservice

    02 septembrie 2015 12:21

    X4vxi8 Thanks a lot for the post.Really thank you! Really Great.

    raspunde comentariului
  • Abram

    02 septembrie 2015 10:06

    Is this a temporary or permanent position? what is elavil used for in cats QUEENSBURY -- The plans for a new outlet center along the Million Dollar Half-Mile got the Planning Boardâ

    raspunde comentariului
  • Hailey

    02 septembrie 2015 10:06

    International directory enquiries best place to buy careprost online It's a vicious circle, the benefits are for people who make mistakes, who've had tragedy in their lives. I understand there are a lot of freeloaders out there who just want the benefits because they are lazy.

    raspunde comentariului
  • Modesto

    02 septembrie 2015 10:06

    How many days will it take for the cheque to clear? buy celexa online - no prescription "We in Ukip have a vision for energy in our country. We want to keep the lights on. We want energy to be affordable, and in an uncertain world we want energy supplies to be secure. We want fuel poverty to be a thing of the past.

    raspunde comentariului
  • Ahmad

    02 septembrie 2015 10:06

    Please wait tadacip from india "Measures to stabilise the rupiah exchange rate are in linewith the fundamental situation and will continue to be done,supported by measures to strengthen monetary policy and deepenforex markets. Bank Indonesia will continue to strengthencoordination with the government and FKSSK to maintainmacroeconomic stability and the nation's financial system,particularly in managing inflation, financial market stability,as well as lowering the current account deficit and the healthof balance of payments.

    raspunde comentariului
  • Ryan

    02 septembrie 2015 10:06

    Get a job price of cymbalta 60 mg at walgreens That isn't to say that Corbat's path is without roadblocks. On calls with analysts and reporters, Corbat and his chief financial officer, John Gerspach, were peppered with questions about a number of potential challenges. Among them proposed new regulations that could require big banks to hold more capital, rising interest rates that could dampen demand for mortgages and a slowdown in growth in emerging market countries, on which Citigroup is heavily reliant.

    raspunde comentariului
  • Paige

    02 septembrie 2015 10:06

    perfect design thanks vermox 100mg A new study suggests that people with obstructive sleep apnea OSA are perceived to appear more alert, more youthful and more attractive after at least two months of continuous positive airway pressure CPAP therapy.

    raspunde comentariului
  • Jarrod

    02 septembrie 2015 10:06

    A law firm penegra online purchase india Fitness buffs untether themselves from their gadgets formany reasons. Often the device doesn't meet user expectations oris limited in what it can do. Users may feel the devices aren'taccurate or haven't had a lasting impact. And sometimes, thenovelty simply wears off.

    raspunde comentariului
  • Alvaro

    02 septembrie 2015 10:06

    A law firm depo provera cost australia Seattle, WA SportsNetwork.com - Kekuta Manneh single-handedly kept his team's playoff hopes alive on Wednesday, recording a hat trick as Vancouver Whitecaps FC pulled out a 4-1 win over Seattle Sounders FC at CenturyLink Field.

    raspunde comentariului
  • Steven

    02 septembrie 2015 10:06

    I'm sorry, she's doxycycline 200 mg bid lyme Chief Superintendent Steve Barry, from Sussex Police, said âThere is no specific information to suggest he is in Sussex, but we would ask anyone who spots him or knows of his whereabouts to dial 999 immediately.

    raspunde comentariului
  • Nestor

    02 septembrie 2015 10:06

    I need to charge up my phone latisse reviews photos Most entrepreneurial businesses I have worked with understand the importance of that truth. The critical importance of the leader to galvinise growth, to build loyalty, to push the needle of performance. They are the turbo charge, the difference between the merely good and the truly great.

    raspunde comentariului
  • Roscoe

    01 septembrie 2015 6:36

    I'd like to send this letter by careprost eye drops uk "I'm perplexed by the whole thing," says John Malloy of BlueRun Ventures, saying he has heard a lot of talk about the crunch on the conference circuit but has seen no evidence of it in his own portfolio.

    raspunde comentariului
  • Rayford

    01 septembrie 2015 6:36

    I'd like to change some money zoloft gynecomastia The document suggests that schools providing a ldquoluxury servicerdquo and charging the highest fees would have to do the most to ensure ldquosomeone of modest meansrdquo can benefit.

    raspunde comentariului
  • Edmund

    01 septembrie 2015 6:36

    What sort of music do you like? cheap bimatoprost sales "We are seeing an unwinding of strong gains from last week,particularly in the Hong Kong property sector," said Linus Yip,a strategist with First Shanghai Securities. "But with the Chinamacro picture improving, investors should probably look toaccumulate Chinese banking shares on weakness."

    raspunde comentariului
  • Rolland

    01 septembrie 2015 6:36

    I want to make a withdrawal ventolin inhaler cost "If 'Jeopardy!' were to give credit for an incorrect response however minor, the show would effectively penalize the other players," they said. "We love presenting young people as contestants on our show and make every effort to be fair and consistent in their treatment."

    raspunde comentariului
  • Merle

    01 septembrie 2015 6:36

    I didn't go to university megalis 10 mg india After several sluggish years, mergers and acquisitionsactivity within the Middle East is showing signs of revival, aseconomies in the Gulf countries improve and the valuation gapbetween buyers and sellers narrows.

    raspunde comentariului
  • Myles

    01 septembrie 2015 6:36

    When can you start? doxycycline hyclate 50 mg for acne Under the current draft, all fertility clinics must be registered and monitored by a regulatory authority. Surrogates must be between 21 and 35 years old, they will be provided with insurance and notarised contracts must be signed between the women and the commissioning parents.

    raspunde comentariului
  • Nathanial

    01 septembrie 2015 6:36

    I'd like to change some money buy serevent diskus Luna Rossa and Emirates Team New Zealand have refused to agree to rule changes affecting the design of a wing-like device known as a rudder elevator attached to the bottom of the blade-like rudders protruding down from the back of each hull to help the boat turn through the water. They maintain that race director Iain Murray does not have the authority to alter such rules.

    raspunde comentariului
  • Thurman

    01 septembrie 2015 6:36

    I'm doing an internship otc tamsulosin âBraun and I used to share an empty locker between us in the clubhouse. He was one of the hardest-working guys Iâ

    raspunde comentariului
  • Nathaniel

    01 septembrie 2015 6:36

    Could you ask her to call me? xenical 120 mg prescription drugs MOSCOWâRussiaâ

    raspunde comentariului
  • Danny

    01 septembrie 2015 6:36

    Children with disabilities pfizer xalatan coupon "I still earn 7,000 rand before deductions. This is the same amount I had been getting before we went on strike. I don039t know who got an increase but I didn039t and I know many of my colleagues who also didn039t get the promised raise," said a miner who did not wish to be named.

    raspunde comentariului
  • Carmen

    31 august 2015 3:46

    How do I get an outside line? cardura e10p cas no She traded currencies for the fund until September 2009, but was later terminated for poor trading performance, the SEC said. After that, Chariot hired a third-party that uses algorithms to trade currency.

    raspunde comentariului
  • Agustin

    31 august 2015 3:46

    Could you tell me the dialing code for ? where can i buy doxycycline in singapore "If it's an emergency band-aid to stop the bleeding, so be it. But we'll need to have a serious think about a plan in the medium and long term once and for all," said Giorgio Squinzi, the head of business lobby Confindustria.

    raspunde comentariului
  • Carey

    31 august 2015 3:46

    Just over two years no prescriptions needed for bimatoprost Both Generation Opportunity and Americans for Prosperity are part of the billionaire Koch brothers-funded empire of independent groups seeking to influence public policy in a more free-market direction.

    raspunde comentariului
  • Denver

    31 august 2015 3:46

    I'm in my first year at university buy tadacip online uk For a taste of New Orleans, try the Oysters Rockefeller at Marcus Samuelsson Red Rooster in Harlem for 14. The southern style crispy fried oysters are served over creamed spinach and topped with bacon hollandaise sauce, crumbled bacon and chives.

    raspunde comentariului
  • Cortez

    31 august 2015 3:46

    In a meeting propecia online buy india ldquoLooking forward, there remain significant economic and geopolitical uncertainties in developed and fast-growth emerging markets,rdquo said Mark Weinberger, EY's Global Chairman and Chief Executive. ldquoDespite these short term uncertainties, we continue to invest for the long term.rdquo

    raspunde comentariului
  • Marissa

    31 august 2015 3:46

    How do you know each other? rogaine foam versus generic Pacific Rubiales, which says it produces around 210,000barrels of oil per day bpd in Colombia or about a fifth ofnational output, said the deal would deliver logistical savings,as well as adding to its production and exploration assets.

    raspunde comentariului
  • Gabriella

    31 august 2015 3:46

    Yes, I play the guitar price ventolin australia Mike Usher, Wales Audit Office group director, said "After concerns were brought to our attention by an assembly member, the Auditor General for Wales decided in September 2012 to conduct a value for money study into the Regeneration Investment Fund for Wales.

    raspunde comentariului
  • Sylvester

    31 august 2015 3:46

    Looking for a job bimatoprost prices Assad's deployment of extra forces reflects the gravity of the challenge to his authority in a region that had remained firmly under his authority since the outbreak of Syria's conflict, which started with peaceful protests in March 2011.

    raspunde comentariului
  • Lester

    31 august 2015 3:45

    I need to charge up my phone bimatoprost cream Importers of newsprint â and other items not produced in Venezuela â must first obtain a certificate of non-domestic production from the Ministry for Commerce. These certificates, according to editors and importers, are being denied.

    raspunde comentariului
  • Graig

    31 august 2015 3:45

    My battery's about to run out order cheap accutane The platform connects interested parties with managers looking to recruit volunteers for an activity or project. The matches are based on the individual's skills and interests, so that person can get involved with something he or she is passionate about, and maybe meet some new friends along the way.

    raspunde comentariului
  • Dwayne

    30 august 2015 1:01

    Can I use your phone? purchase trimethoprim online "It was the domino effect â you hit the first pin and it keeps on going and going," Said Awad, 23, who grew up in the United Arab Emirates and lives there. "I thought It doesn't make sense anymore. I became a new person then."

    raspunde comentariului
  • Luigi

    30 august 2015 1:01

    What's the interest rate on this account? bimatoprost xr online Boonen, who won the world road race title in 2005 and the Tour de France points classification two years later, is one of the most successful riders despite having been in trouble after failing a dope test for cocaine in 2008.

    raspunde comentariului
  • Myles

    30 august 2015 1:01

    I've just started at cheapest place to buy doxycycline If Julie Julia taught us anything, itâ

    raspunde comentariului
  • Porter

    30 august 2015 1:01

    Did you go to university? bimatoprost breast milk Jurors looked away at times as the prosecutor showed autopsy photos of Martin. De la Rionda recounted the stories of several witnesses including Rachel Jeantel, a woman of Haitian descent whose testimony was laced with some street slang.

    raspunde comentariului
  • Walton

    30 august 2015 1:00

    Could you please repeat that? vase d'expansion megalis The "Fix the Debt" group calls for any short-term debt dealto be followed by fiscal reform to reduce the deficit. The CEOsinsist that avoiding a shutdown cannot be the final goal and saya comprehensive bipartisan agreement on politically sensitivetax and spending reforms is needed.

    raspunde comentariului
  • Brooke

    30 august 2015 1:00

    My battery's about to run out can rogaine cause frontal hair loss Those manning the tannoys as the Prince arrived in various rings to present trophies and speak to participants did their best to whip up a flavour of the baby fever that has gripped the country in recent weeks.

    raspunde comentariului
  • Margarito

    30 august 2015 1:00

    I want to make a withdrawal abilify discount program The peculiarity, funds say, was more the past four years of Fed dollar printing that saw the boom in primary bond sales in the high yield corporate and emerging market areas dominate the market as investors escaped from record low benchmark returns.

    raspunde comentariului
  • Jimmi

    30 august 2015 1:00

    Just over two years bimatoprost y timolol That doesnâ

    raspunde comentariului
  • Willis

    30 august 2015 1:00

    I enjoy travelling premarin cost increase Some 500,000 Israeli settlers live in the West Bank and East Jerusalem, areas captured in the 1967 Middle East war, amid 2.5 million Palestinians. Israel withdrew in 2005 from the Gaza Strip, which is now governed by Hamas Islamists opposed to permanent co-existence with the Jewish state.

    raspunde comentariului
  • Geoffrey

    30 august 2015 1:00

    Whereabouts in are you from? zithromax pack From there, Devin Gardner put the Wolverines on his back. He hit Jeremy Gallon for 24 yards, and got 11 more on another throw as Penn State was flagged for pass interference. Three Gardner runs for another 22 yards moved the ball into the Penn State red zone, and from there Gardner hit Gallon again, this time for 16 yards and a touchdown, reclaiming the lead, 27-24.

    raspunde comentariului
  • Allan

    28 august 2015 22:07

    I'm not sure cheapest tadacip An adviser expressed surprise that the top brokerage job was not passed to David Kowatch, a close ally of Ludeman who became head of Wells Fargo's sprawling branch brokerage system last October when Mack moved from running the branch banking brokerage network to the products job.

    raspunde comentariului
  • Richard

    28 august 2015 22:07

    I'm sorry, she's buy tretinoin retin a online But Orkney Islander Mr Corrigall, 23, who hopes to break in the GB rowing squad before the 2016 Rio Olympics, was cleared of the assault at Mayfairrsquos Mahiki at Hammersmith Magistratesrsquo Court, west London.

    raspunde comentariului
  • Blair

    28 august 2015 22:07

    Could I have an application form? zetia cost Once again, the Blueshirts will be the Road Rangers in October, due to the third and final phase of renovations at the Garden. They'll open their regular season schedule with nine consecutive away games, a franchise record to start a season. They will open Oct. 3 at the Phoenix Coyotes and will not host their home opener until Oct. 28 against the Montreal Canadiens.

    raspunde comentariului
  • Pablo

    28 august 2015 22:07

    We've got a joint account topamax rebate Aggressive enforcement of federal criminal laws is necessary, but "we cannot simply prosecute or incarcerate our way to becoming a safer nation," Holder said. "Today, a vicious cycle of poverty, criminality and incarceration traps too many Americans and weakens too many communities. However, many aspects of our criminal justice system may actually exacerbate this problem, rather than alleviate it."

    raspunde comentariului
  • Brianna

    28 august 2015 22:07

    I don't know what I want to do after university aldactone price in india FireEye soared to 44.89 at one point on Friday, more than doubling its 20 IPO price. It fell back in later trading and closed at 36 for an 80 percent gain. That was enough to accord it the sixth best debut of 2013, behind companies such as Sprouts Farmers Market Inc and Noodles Co, the two best performers so far this year.

    raspunde comentariului
  • Vernon

    28 august 2015 22:07

    I'd like some euros bcs classification of latanoprost The problem with social revolution is that societies are incredibly complicated, and the lives of most people are so interwoven with the lives of the people around them that reorganizing society involves cutting the fabric of society apart. In real life, that cutting takes the form of bloodshed.

    raspunde comentariului
  • Gayle

    28 august 2015 22:07

    How long have you lived here? zoloft euphoria This is just another example of rapacious american chain outlets like Wal-mart pretending to not know working conditions in sweatshop factories abroad where the pay is dirt cheap and no workers rights or safety. They pass the blame onto some local business scoundrel so as to insulate themselves from any legal responsibility because the moral side does not interest them it's capitalism gone wild.

    raspunde comentariului
  • Maxwell

    28 august 2015 22:07

    I'd like to tell you about a change of address buy provera 10mg online The rot only stopped when the 15-nation Southern AfricanDevelopment Community SADC forced Mugabe and Tsvangirai into apower-sharing government in 2009 that made scrapping theworthless Zimbabwe dollar one of the first things it did. Thecountry currently uses the U.S. dollar and South African rand.

    raspunde comentariului
  • Andreas

    28 august 2015 22:07

    I really like swimming generic vermox Additionally, wild and extreme swings in the climate could have an impact on Marin's water supply. Some years the Bay Area will go through extended droughts. Other years it may get unusually heavy rainfall. That could prove problematic for Marin's water supply, which largely relies on rainfall collected in reservoirs on the Mount Tamalpais watershed and in Sonoma County.

    raspunde comentariului

Newsletter