EP 1195214 A1 20020410 - Metal-made seamless pipe and process for production thereof

Title (en)

Metal-made seamless pipe and process for production thereof

Title (de)

Nahltloses Metalrohr und Verfahren zu seiner Herstellung

Title (fr)

Tube sans soudure en métal et procédé pour sa fabrication

Publication

EP 1195214 A1 20020410 (EN)

Application

EP 01308458 A 20011003

Priority

JP 0006876 W 20001003
JP 2001217592 A 20010718

Abstract (en)

A metal-made seamless pipe contains, as a main component, at least one kind of metal selected from the group consisting of metals each having a melting point of 1,600 DEG C or more. The metal-made seamless pipe has a porosity of 0.3 to 25% when the porosity is defined as a proportion of the open pores not perforating in the thickness direction of the pipe, present at the outer surface of the pipe, to the total area (100%) of the outer surface of the pipe; and a process for producing such a metal-made seamless pipe. The metal-made seamless pipe is low in processability but can be produced in a small thickness and a small inner diameter, is superior in mechanical strengths and gastightness, and can be suitably used as a sealing member of a translucent vessel of a high-pressure discharge lamp.

IPC 1-7

B22F 3/11; B22F 5/10; H01J 61/36

IPC 8 full level

H01J 5/36 (2006.01); B22F 3/11 (2006.01); B22F 5/10 (2006.01); C04B 38/00 (2006.01); C22C 32/00 (2006.01); H01J 61/36 (2006.01)

CPC (source: EP)

B22F 3/1103 (2013.01); B22F 5/106 (2013.01); C22C 32/0031 (2013.01); H01J 61/366 (2013.01)

Citation (search report)

[XY] US 3626744 A 19711214 - SORGENFREI FREDERICK J
[XY] US 5910007 A 19990608 - SHIMODAIRA KENICHI [JP], et al
[YD] EP 0982278 A1 20000301 - NGK INSULATORS LTD [JP]
[Y] PATENT ABSTRACTS OF JAPAN vol. 007, no. 001 (M - 183) 6 January 1983 (1983-01-06)

Designated contracting state (EPC)

BE DE FR GB NL

DOCDB simple family (publication)

EP 1195214 A1 20020410; EP 1195214 B1 20041222; CN 1151539 C 20040526; CN 1347135 A 20020501; CZ 20013545 A3 20020515; CZ 296639 B6 20060517; DE 60107914 D1 20050127; DE 60107914 T2 20051215

DOCDB simple family (application)

EP 01308458 A 20011003; CN 01135350 A 20010930; CZ 20013545 A 20011002; DE 60107914 T 20011003