| 1956-07 |
神戸製鋼所長府工場にて仏CEFILAC社から熱間押出法の技術を導入 |
| 1956-07 |
Technical agreement with CEFILAC of France approved for use of the Ugine Sejournet hot extrusion process. |
| 1957-01 |
継目無鋼管の試作開始 |
| 1957-09 |
Full production began. |
| 1958-10 |
熱間工場、鋼片加工工場の完成 |
| 1958-10 |
Hot-finish processing plant and billet preparation plant completed. |
| 1959-01 |
冷間工場完成 |
| 1959-01 |
Cold-finish processing plant and related facilities completed. |
| 1959-02 |
神戸製鋼所長府北工場と改称 |
| 1960-01 |
JIS表示認定 |
| 1960-04 |
Use of JIS mark on products approved. |
| 1960-11 |
LLOYD認定工場 |
| 1960-11 |
Authorization as Lloyd-approved plant. |
| 1965-05 |
西独TUV認定工場 |
| 1965-05 |
Authorization as TUV-approved plant. |
| 1966-03 |
原子燃料被覆管専用工場完成 |
| 1966-03 |
Specialized plant for manufacture of nuclear fuel cladding tube completed. |
| 1967-04 |
DNV認定工場 |
| 1967-04 |
Authorization as DNV-approved plant. |
| 1969-07 |
押出プレス押出本数２００万本突破 |
| 1970-09 |
原子燃料被覆管製造設備増強 |
| 1970-09 |
Manufacturing facilities for nuclear fuel cladding tube expanded. |
| 1971-04 |
JIS表示認可優良工場として広島通産局長賞受賞 |
| 1971-04 |
Cited by the Hiroshima Bureau of the Ministry of International Trade and Industry (MITI) for outstanding performance as JIS plant. |
| 1972-10 |
GE社とジルカロイ被覆管製造に関する相互技術提携契約締結 |
| 1973-02 |
U字管検査梱包専用工場完成 |
| 1973-02 |
Workshop completed for inspection and packaging of stainless steel U-tube. |
| 1974-10 |
JIS表示認可優良工場として工業技術院長賞受賞 |
| 1975-03 |
長尺細管専用製造設備完成 |
| 1975-03 |
Specialized production facilities completed for long-length, small-diameter tube. |
| 1976-01 |
被覆管生産能力２５万ｍ／年増強工事完成 |
| 1978-10 |
溶接管製造機設置 |
| 1979-08 |
JIS表示認可優良工場として通産大臣賞受賞 |
| 1979-10 |
Cited by Minister of MITI for outstanding performance as JIS plant. |
| 1980-04 |
無災害１，５００日達成 鉄連優秀賞受賞 |
| 1981-06 |
原子燃料被覆管専用新工場完成（生産能力５０万ｍ／年体制） |
| 1981-06 |
New plant completed for manufacture of nuclear fuel cladding tube. |
| 1983-04 |
KR認定工場 |
| 1983-04 |
Authorization as KR(Korean Register of shipping) - approved plant. |
| 1984-11 |
半導体工場用クリーンパイプ製造開始 |
| 1985-02 |
エネルギー管理優良工場として広島通産局長賞受賞 |
| 1987-01 |
ステンレス鋼精密細管工場完成 |
| 1987-01 |
Plant for manufacture of precision stainless steel tube completed. |
| 1988-10 |
チタン溶接管工場完成 |
| 1988-10 |
Plant for manufacture of weld titanium tube completed. |
| 1989-11 |
デミング賞受賞 |
| 1989-11 |
Awarded the 1989 Quality Control Award for factory by the Deming Prize Committee. |
| 1989-12 |
Plant for manufacture of Excel Clean Pipe completed. |
| 1991-12 |
ジルカロイ被覆管設備増強工事完成 |
| 1991-12 |
Plant for manufacture of nuclear fuel cladding tube completed. |
| 1992-07 |
ISO9002認証 |
| 1992-07 |
Authorized as ISO 9002 plant. |
| 1994-05 |
押出プレス増強工事完成（２，０００トンに増強） |
| 1996-04 |
(株)神戸製鋼所より分社し神鋼特殊鋼管株式会社として独立 |
| 1996-04 |
Kobe Special Tube Co.,Ltd. established. |
| 2000-04 |
ジルカロイ被覆管部門を分社 |
| 2000-04 |
Zircaloy fuel cladding tube section separated and established Zirco Products Co.,Ltd. |
| 2002-11 |
ISO9001(2000年版）認証更新 |
| 2002-11 |
Authorized as ISO 9001 company. (Version 2000) |
| 2005-04 |
押出プレス累計押出本数１,０００万本達成 |
| 2005-04 |
The total number of extruded pipes achieved 10,000,000 |
| 2005-07 |
Authorized as JISHA OSHMS. |
| 2007-01 |
新ＪＩＳマーク表示許可(JICQA) |
| 2007-01 |
Use of new JIS mark on products approved. |
| 2007-02 |
Authorized as ISO14001 company.(Version 2004) |
| 2007-03 |
Plant for manufacture of Bright Annealing Pipes expanded. |
| 2007-05 |
Plant for manufacture of welded titanium tubes expanded. |
| 2008-10 |
冷間工場増強 |
| 2008-10 |
cold-finish processing plant expanded. |
| 2016-04 |
コベルコ鋼管株式会社へ社名変更 |
| 2016-04 |
Renamed as Kobelco Steel Tube Co.,Ltd. |
| 2018-02 |
ISO14001（2015年版）認証更新（JICQA) |
| 2018-02 |
Authorized as ISO 14001 company.(Version 2015) |
| 2018-08 |
ISO9001（2015年版）認証更新（JICQA) |
| 2018-08 |
Authorized as ISO 9001 company.(Version 2015) |
| 2018-10 |
コイル管工場稼働 |
| 2018-10 |
Specialized production facilities for coiled tubes completed. |
| 2019-01 |
BA管工場増強 |
| 2019-01 |
Manufacturing facilities for BA tubes expanded. |
| 2020-06 |
丸一ステンレス鋼管株式会社へ社名変更 |
| 2020-06 |
Renames as Maruichi Stainless Tube Co., Ltd. |
| 2021-10 |
チタン溶接管事業撤退 |
| 2021-10 |
コイル管工場増強 |
| 2021-10 |
Withdrawal from welded titanium tubes. |
| 2021-10 |
Manufacturing facilities for coiled tubes expanded. |
| 2022-08 |
米国BA管製造会社（MST-X）設立 |
| 2022-08 |
Maruichi Stainless Tube Texas Corporation. established. |
| 2022-10 |
BA管工場増強 |
| 2022-10 |
Plant for manufacture of Bright Annealing Tubes expanded. |
