JPH03111475U - - Google Patents

Info

Publication number

JPH03111475U

JPH03111475U JP2009490U JP2009490U JPH03111475U JP H03111475 U JPH03111475 U JP H03111475U JP 2009490 U JP2009490 U JP 2009490U JP 2009490 U JP2009490 U JP 2009490U JP H03111475 U JPH03111475 U JP H03111475U

Authority

JP

Japan

Prior art keywords

gas

welding

pipe manufacturing

pipe

shield box

Prior art date

1990-02-27

Legal status (The legal status 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 status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000010926 purge Methods 0.000 claims description 4
• 238000004519 manufacturing process Methods 0.000 claims 3
• 238000003466 welding Methods 0.000 claims 3
• 229910000831 Steel Inorganic materials 0.000 claims 1
• 238000009751 slip forming Methods 0.000 claims 1
• 239000010959 steel Substances 0.000 claims 1
• 239000007789 gas Substances 0.000 description 3
• QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 239000001301 oxygen Substances 0.000 description 1
• 229910052760 oxygen Inorganic materials 0.000 description 1