Нержавеющие фланцы

28 июля 2015г. - 12:24 3648 просмотров


Нержавеющие фланцыНержавеющий фланец – это часть трубопровода, которая предназначена для крепления и соединения валов, а также трубопроводной арматуры и труб. Имеет форму диска или плоского кольца.

Для того чтобы обеспечить ему высокую герметичность, его можно соединять несколькими способами: с помощью шипа, выступа, паза или впадины. Такая деталь изготавливается из нержавеющей стали: чаще всего марок 10Х17Н13М2Т и 12Х18Н10Т, но можно использовать любые другие виды нержавеющей стали.

Разновидности нержавеющих фланцев:

  1. Плоские;
  2. Резьбовые;
  3. Воротниковые.

Плоские привариваются к внешней поверхности трубы. То есть наружный диаметр трубы меньше чем, диаметр плоского изделия.

Воротниковые нержавеющие привариваются к трубе встык, то есть диаметр трубы совпадает с их диаметром. Используются для того, чтобы соединять одни трубопровод с другим при давлении от 0,1 до 20 МПа и при температуре от -70 до +600ºС. В зависимости от типа фланцевого соединения их разделяют на два вида. В первом есть зазор между торцами, а в другом, соответственно, нет.


Реже всего в трубопроводной арматуре используются резьбовые модели.

Также фланцы можно распределить по способу крепления:

  1. Для валов;
  2. Для корпусных деталей;
  3. Для труб;
  4. Для фитинга.

Использование нержавеющих фланцев.

В наше время с помощью трубопроводов транспортируют разнообразные виды жидкостей и горючих смесей. Естественно, наиболее проблемными являются места, где соединяются трубы между собой и места, где соединяется трубопровод с оборудованием.

Разновидности нержавеющих фланцев
Нержавеющие модели отличаются от других по нескольким параметрам. По технологическим характеристикам они бывают квадратными и круглыми. Соединения с помощью таких изделий широко используются в трубопроводах предназначенных для транспортировки холодной и горячей воды.

Благодаря этим деталям обеспечивается надежное и качественное присоединение труб между собой, а также к автоматам и прочему оборудованию. Для каждой их разновидности существует два варианта присоединения: «фланец – фланец с корпусом» и просто «фланец-фланец».

Фланцы из нержавеющей стали
Чаще всего нержавеющие фланцы изготавливаются согласно ГОСТу, но можно изготавливать продукцию на основе западных стандартов американского общества инженеров-механик, американского национального института стандартов, немецкого института стандартизации. Также можно производить их по индивидуальным чертежам.

Виды стандартов, которые применяются в наше время:

  • ГОСТ 12820-80;
  • ГОСТ 12822-80;
  • ГОСТ 12821-80.

Согласно ГОСТ 12820-80, модель на приварном кольце применяется для соединения трубопроводов при давлении 0,1–2,5 МПа и при температуре от -30 и до +300ºС. Она изготавливается с уплотнительной поверхностью.

Согласно ГОСТ 12820-80, приварной нержавеющий плоский фланец применяется в трубопроводной арматуре при давлении 0,1–2,5 МПа и при температуре от –60 до +500ºС. Такой вид фланцевых соединений самый распространенный.

Нержавеющие детали, которые предназначены для сосудов и аппаратов делают по ГОСТ 28759.2–90, ГОСТ 28759.4–90, ГОСТ 28759.3–90 (это стандартные нормы). Они распространяются на стальные (нержавеющие) модели, которые привариваются встык. Днище трубы или базовый размер имеет метраж 426–720 мм. Внутренний диаметр – от 400 до 4000 мм. Давление, которое может выдержать данное изделие, колеблется от 0,6–6,3 МПа, а температурные показатели от -70 до +54ºС. Нержавеющие фланцы предназначены для использования в химической, нефтехимической и нефтеперерабатывающей промышленностях.


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