SU624061A1 - Method of lining flanged metal articles with teflon - Google Patents
Method of lining flanged metal articles with teflonInfo
- Publication number
- SU624061A1 SU624061A1 SU762348238A SU2348238A SU624061A1 SU 624061 A1 SU624061 A1 SU 624061A1 SU 762348238 A SU762348238 A SU 762348238A SU 2348238 A SU2348238 A SU 2348238A SU 624061 A1 SU624061 A1 SU 624061A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- lining
- teflon
- metal articles
- flanged metal
- product
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
данном случае поток имеет нулевую скорость) жидкость преп тствует радиальной деформации футерующего сло к центру издели . При снижении давлени внутри издели ниже атмосферного падает и абсолютное давление жидкости в зазоре вследствие гибкости фторопластового футерующего сло , притом так, что давление в каждый момент времени по обе стороны сло будет одинаковым. При нёограничёниом снижении давлени внутри издели nioжет наступить такой момент, когда он станет равным давлению насыщенного пара этой жидкости при рабочей температуре среды в изделии. А поскольку допускать перехода жидкости в пар нельз , нижний предел рабочего давлени в изделии будет определ тьс величиной давлени насшценного пара пр мененной жидкости при рабочей теэетературе среда в изделии.In this case, the flow has a zero velocity) the liquid prevents the radial deformation of the lining layer to the center of the product. When the pressure inside the product drops below atmospheric pressure, the absolute pressure of the fluid in the gap also decreases due to the flexibility of the fluoroplastic lining layer, moreover, so that the pressure at each time point on both sides of the layer will be the same. When there is no limit on the pressure drop inside the product, a moment will come when it becomes equal to the saturated vapor pressure of this liquid at the operating temperature of the medium in the product. And since it is impossible to allow liquid to pass into vapor, the lower limit of the operating pressure in the product will be determined by the pressure value of the superheated steam of the direct fluid at the operating temperature and the environment in the product.
Кроме того, следует учесть, что коэффициент теплового расширени фторош1аста-4 примерно на пор док Btaue, чем у стали, поэтому, при нагревании в футерующем слое, зажатом с лвух сторон фланцами царги, обычно возникают сжимающие напр жени , особенно большие в районе перехода цилиилфической части футерующего,сло во фланцевую часть. При наличии жидкости в зазоре стремление футерующего сло расширитьс в осевом и радиальном направлени х встречает со стороны жидкости сопротивление понижению ее абсолютного давлени .In addition, it should be taken into account that the thermal expansion coefficient of fluorostap-4 is approximately Btaue order than that of steel, therefore, when heated in the lining layer, clamped on the flanks of the tsargs on the two sides, compressive stresses usually occur, especially large in the area of the transition parts of the lining, layer in the flange part. In the presence of fluid in the gap, the tendency of the lining layer to expand axially and radially, on the fluid side, resists a decrease in its absolute pressure.
;Это способствует распределению сжимающих напр жений на большую часть футерующего сло , что увеличивает его срок службы.This contributes to the distribution of compressive stresses over most of the lining layer, which increases its service life.
Применение предлагаемого способа позвол ет исключить зависимость толщины футерующего сло от величины давлени внутри издели и от диаметра издели , а также расширить диапа зон применимости фторопласта-4 в качестве конструкционного материала дл защиты различных изделий от воздействи рабочих сред.The application of the proposed method eliminates the dependence of the thickness of the lining layer on the pressure inside the product and on the diameter of the product, as well as extends the range of applicability of the fluoroplastic-4 as a structural material for protecting various products from exposure to working media.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762348238A SU624061A1 (en) | 1976-04-07 | 1976-04-07 | Method of lining flanged metal articles with teflon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762348238A SU624061A1 (en) | 1976-04-07 | 1976-04-07 | Method of lining flanged metal articles with teflon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU624061A1 true SU624061A1 (en) | 1978-09-15 |
Family
ID=20657120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762348238A SU624061A1 (en) | 1976-04-07 | 1976-04-07 | Method of lining flanged metal articles with teflon |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU624061A1 (en) |
-
1976
- 1976-04-07 SU SU762348238A patent/SU624061A1/en active
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