Threaded joint for steel tube

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

F16L 15/00 (2006.01) C10M 171/00 (2006.01)

Patent

CA 2454336

A threaded joint for steel pipes which is capable of metal-to-metal sealing and which can be subjected to repeated fastening and unfastening without the application of a liquid lubricant containing a heavy metal powder comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box are coated with an undercoating layer and a lubricating coating layer atop it. The undercoating layer is a porous metal coating having a porosity of 5 - 80% and a thickness of 1- 30 µm and preferably a hardness of 50 - 250 Hv. The lubricating coating is a solid lubricating coating or a liquid lubricating coating, the latter containing substantially no heavy metal powders. The total thickness of the undercoating layer and the lubricating coating layer is at most 100 µm.

L'invention concerne un joint fileté scellable par métal destiné à un tube d'acier et pouvant être serré et desserré de manière répétée sans qu'il soit nécessaire d'y appliquer un lubrifiant liquide contenant de la poudre de métal lourd. Ce joint comprend une tige et un boîtier possédant chacun une surface de contact comportant une partie de vis et une partie de contact en métal sans vis, la surface de contact de la tige et/ou du boîtier étant recouverte d'une couche préparée en surface et d'une couche de film de lubrification appliquée sur celle-ci. La couche préparée en surface revêt de préférence la forme d'une couche métallique poreuse de 50 à 250 Hv présentant une porosité de 5 à 80 % et une épaisseur de 1 à 30 mu m, la couche de film de lubrification étant constituée d'un film de lubrification solide ou d'un film de lubrification liquide sensiblement exempt de poudre de métal lourd, le total des épaisseurs de la couche préparée en surface et de la couche de film de lubrification étant inférieur ou égal à 100 mu m.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Threaded joint for steel tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Threaded joint for steel tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Threaded joint for steel tube will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1668173

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.