专利名称：A THREADED JOINT FOR TUBES
发明人：MOROTTI, Matteo,DELL'ERBA, Diego,DELLA
PINA, Giuseppe
申请号：EP04710000.3申请日：20040211公开号：EP1599689A1公开日：20051130
摘要：Described herein is a threaded joint, in which the threads are coated with a layerof dry lubricant having a thickness of between 5 mum and 30 mum and in which thenominal void volume NVV of the space ( 6, 7 ) between the thread of the male tube andthe thread of the female tube, is sized by means of the following formulae: NVV [ cm 3 ]<= 4 x OD [ inch ] NVV [ cm 3 ] OD [ inch ] x Wt [ mm ] <= 1 g T <= 0.4 mm 2 / pitchwhere OD is the nominal outer diameter and Wt is the thickness of the wall of the pipes.
申请人：Tenaris Connections AG
地址：Bahnhofstrasse 7, Postafch 48 9494 Schaan LI
国籍：LI
代理机构：Cinquantini, Bruno
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