发明名称 |
VERFAHREN ZUR VORBEHANDLUNG DER VERBINDUNGSELEMENTE EINER GASDICHTEN MUFFEN-ROHRVERBINDUNG |
摘要 |
The invention relates to a process for pretreating the coupling elements of a gas-tight sleeve-pipe coupling with a metallic sealing seat and an abutment shoulder for repeated screwing together of casing and tubing, made of high-alloy steel, for the petroleum industry and natural gas industry, in which the sealing and thread region of the sleeve is provided with a metallic coating and lubricant is applied, before screwing together, to the cleaned sealing and thread regions of the coupling elements. To provide a simple pretreatment of the coupling elements of a gas-tight sleeve-pipe coupling, by means of which repeated screwing together is reproducibly ensured for high-alloy, austenitic steels and nickel-based austenitic materials, it is proposed that, for coupling elements of austenitic steels with chromium and nickel contents greater than 20% by weight and molybdenum contents greater than 2.5% by weight, and of austenitic materials with nickel contents greater than 50% by weight and chromium and molybdenum contents greater than 10% by weight, a ceramic-based, metal-free paste known per se be applied, before screwing together, as lubricant to the sleeve and to the bright spigots of the pipes which are to be coupled. …<IMAGE>… |
申请公布号 |
DE4121488(A1) |
申请公布日期 |
1993.01.14 |
申请号 |
DE19914121488 |
申请日期 |
1991.06.26 |
申请人 |
MANNESMANN AG, 4000 DUESSELDORF, DE |
发明人 |
KRINGS, REINER, DR.-ING., 4000 DUESSELDORF, DE;NIMTSCHEK, HANSJOACHIM, DIPL.-ING., 4130 MOERS, DE |
分类号 |
F16L15/04;C10M169/00;E21B17/042;F16B33/06;F16L15/00 |
主分类号 |
F16L15/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|