MD3818F1 - Process for manufacturing the permanent joint of the polyethylene-steel pipes - Google Patents

Process for manufacturing the permanent joint of the polyethylene-steel pipes

Info

Publication number
MD3818F1
MD3818F1 MDA20070166A MD20070166A MD3818F1 MD 3818 F1 MD3818 F1 MD 3818F1 MD A20070166 A MDA20070166 A MD A20070166A MD 20070166 A MD20070166 A MD 20070166A MD 3818 F1 MD3818 F1 MD 3818F1
Authority
MD
Moldova
Prior art keywords
pipes
polyethylene
removable
working
pipe
Prior art date
Application number
MDA20070166A
Other languages
Romanian (ro)
Other versions
MD3818G2 (en
Inventor
Nicolai Barbul
Original Assignee
Nicolai Barbul
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nicolai Barbul filed Critical Nicolai Barbul
Priority to MDA20070166A priority Critical patent/MD3818G2/en
Publication of MD3818F1 publication Critical patent/MD3818F1/en
Publication of MD3818G2 publication Critical patent/MD3818G2/en

Links

Landscapes

  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

Inventia se refera la procedeele de confectionarea imbinarilor nedemontabile ale tevilor de polietilena si de otel, destinate pentru conductele industriei gazului. Procedeul de confectionare a imbinarii nedemontabile ale tevilor polietilena-otel consta in aceea ca preliminar se confectioneaza semifabricatele pentru tevi, se formeaza portiunea de lucru a semifabricatului tevii de polietilena prinincalzirea lui, presarea cu utilizarea mandrinei si racirea ulterioara, la asamblare se imbina portiunea de lucru a tevii de polietilena cu portiuneade lucru a tevii de otel, dupa care pe portiunea de lucru a tevilor se preseaza un manson de polietilena. Lungimea semifabricatelor pentru tevi L in mm se determina conform formulei: L = (250...400) + d, unde d este diametrul exterior al tevii de otel, portiunea de lucru formata a tevii de polietilena se fixeaza cu o bobina demontabila, lungimea de lucru a careia constituie (1,2...1,4)d, iar inaintea asamblarii tevilor, bobina demontabila se inlatura de la teava de polietilena. Portiunea de lucru a semifabricatului tevii de polietilena se formeaza in forma de mufa sau ingustare, iar diametrulde fixare a bobinei demontabile constituie respectiv (0,97...0,99)d sau (0,83...0,94)d. Rezultatul consta in utilizarea rationala a materialelor la confectionarea semifabricatelor pentru tevi, in posibilitatea utilizarii repetate a imbinarii nedemontabile in sistemul de conducte de gaze, in fixareadimensiunilor portiunii de lucru a tevii de polietilena si in reducerea capacitatii de consum a energiei.The invention relates to the processes for making non-removable joints of polyethylene and steel pipes, intended for the pipes of the gas industry. The process of making the non-removable joint of the polyethylene-steel pipes consists in the fact that the prefabricated pipes are made for the pipes, the working portion of the polyethylene pipes is formed by heating it, pressing it with the use of the spindle and subsequent cooling, when assembled. of the polyethylene pipes with portions working of the steel pipes, after which on the working part of the pipes a polyethylene sleeve is pressed. The length of the semi-finished products for pipes L in mm is determined according to the formula: L = (250 ... 400) + d, where d is the outer diameter of the steel pipe, the working part formed of the polyethylene pipe is fixed with a removable coil, the length of working which constitutes (1,2 ... 1,4) d, and before the assembly of pipes, the removable coil is removed from the polyethylene pipe. The working portion of the polyethylene pipe semi-fabricated is formed in the form of a plug or narrower, and the fixing diameter of the removable coil constitutes respectively (0.97 ... 0.99) d or (0.83 ... 0.94) d . The result is the rational use of materials for the manufacture of semi-finished products for pipes, the possibility of repeated use of the non-removable connection in the gas pipeline system, in fixing the dimensions of the working part of the polyethylene pipe and in reducing the energy consumption capacity.

MDA20070166A 2007-06-07 2007-06-07 Process for manufacturing the permanent joint of the polyethylene-steel pipes MD3818G2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MDA20070166A MD3818G2 (en) 2007-06-07 2007-06-07 Process for manufacturing the permanent joint of the polyethylene-steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MDA20070166A MD3818G2 (en) 2007-06-07 2007-06-07 Process for manufacturing the permanent joint of the polyethylene-steel pipes

Publications (2)

Publication Number Publication Date
MD3818F1 true MD3818F1 (en) 2009-01-31
MD3818G2 MD3818G2 (en) 2009-10-31

Family

ID=40347773

Family Applications (1)

Application Number Title Priority Date Filing Date
MDA20070166A MD3818G2 (en) 2007-06-07 2007-06-07 Process for manufacturing the permanent joint of the polyethylene-steel pipes

Country Status (1)

Country Link
MD (1) MD3818G2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD317P2 (en) * 1995-01-30 1996-04-30 Institutul De Cercetari Stiintifice, Selectie Si Tehnologii Pentru Pomicultura Variety of walnut-tree Skinosskii

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1760228A1 (en) * 1990-12-20 1992-09-07 Всесоюзный научно-исследовательский институт по строительству магистральных трубопроводов Method for joining polyethylene to steel tubes
RU2127394C1 (en) * 1997-04-09 1999-03-10 Владимир Николаевич Никифоров Method of permanent connection of polyethylene-steel pipes and permanent joint used for realization of this method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD317P2 (en) * 1995-01-30 1996-04-30 Institutul De Cercetari Stiintifice, Selectie Si Tehnologii Pentru Pomicultura Variety of walnut-tree Skinosskii

Also Published As

Publication number Publication date
MD3818G2 (en) 2009-10-31

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Legal Events

Date Code Title Description
FG4A Patent for invention issued
KA4A Patent for invention lapsed due to non-payment of fees (with right of restoration)
MM4A Patent for invention definitely lapsed due to non-payment of fees