10
14 & 20 December 2025
Yeongnam Energy
MP stopping, 400A × 2 points (2 sets, 4 points total)
Track Record
A record built in the field
No-shutdown tapping and stopping work delivered since 1997 for city gas utilities, KOGAS supply lines and steel plants across Korea. Figures as compiled by Kim Han-seop, CEO of JH Engineering.
2016–2025 total
1,978
sites
2025
323
sites
Largest bore executed
400A
MP stopping / branch tap
Max simultaneous points
4
points (2 sets)
Notable Projects
Notable projects
The harder jobs — large-bore medium-pressure isolations with by-pass. All photographs are from the actual sites.
09
10 & 12 December 2025
Yeongnam Energy
MP stopping, 400A × 2 points (2 sets, 4 points total)
08
October 2024
Yeongnam Energy
MP branch tap, 400A × 400A × 1 point
07
March 2024
Chungbuk City Gas (KOGAS line)
MP stopping 400A × 2 points with one 200A by-pass set
06
October 2023
Yeongnam Energy
MP stopping, 400A × 2 points
05
September 2023
Yeongnam Energy
MP stopping 400A × 2 points with one 100A by-pass set
04
February 2023
GSE (KOGAS line)
MP stopping 400A × 2 points with one 200A by-pass set
03
August 2022
Chungbuk City Gas (KOGAS line)
MP stopping 400A × 4 points with two 300A by-pass sets, executed simultaneously
02
August 2022
Chungbuk City Gas (KOGAS line)
MP stopping 400A × 2 points with one 300A by-pass set
01
April 2022
Chungbuk City Gas (KOGAS line)
MP stopping 400A × 4 points with two 300A by-pass sets, executed simultaneously
By Year
Projects by year
| Year | Scope of work | Volume | Client | Bore |
|---|---|---|---|---|
| 2025 | LP/MP stopping & branch tapping, etc. | 323 sites | GSE | 400A 외 |
| KOGAS | 400A 외 | |||
| Korea Urban Railway Corp. | 300A 외 | |||
| Wonju City Gas | 300A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Jeonnam City Gas | 300A 외 | |||
| Kyungnam Energy | 400A 외 | |||
| Jeju City Gas | 300A 외 | |||
| Chungbuk City Gas | 300A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| Seongdo Industry, Jeil Industry | 400A 외 | |||
| Daegeon, CS, Nara | 400A 외 | |||
| 2024 | LP/MP stopping & branch tapping, etc. | 295 sites | GSE | 400A 외 |
| KOGAS | 400A 외 | |||
| Korea Urban Railway Corp. | 300A 외 | |||
| Wonju City Gas | 300A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Kyungnam Energy | 400A 외 | |||
| Jeju City Gas | 300A 외 | |||
| Chungbuk City Gas | 300A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| Seongdo Industry, Jeil Industry | 400A 외 | |||
| Daegeon, CS, Nara | 400A 외 | |||
| 2023 | LP/MP stopping & branch tapping, etc. | 365 sites | GSE | 400A 외 |
| KOGAS | 400A 외 | |||
| Korea Urban Railway Corp. | 300A 외 | |||
| Wonju City Gas | 300A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Jeonnam City Gas | 300A 외 | |||
| Haeyang Energy | 300A 외 | |||
| Kyungnam Energy | 400A 외 | |||
| Jeju City Gas | 300A 외 | |||
| Seorabeol City Gas | 200A 외 | |||
| Chungbuk City Gas | 300A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2022 | MP line stopping & by-pass, etc. | 246 sites | KOGAS | 400A 외 |
| Korea Urban Railway Corp. | 400A 외 | |||
| Chungbuk City Gas | 300A 외 | |||
| Wonju City Gas | 400A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Jeonnam City Gas | 300A 외 | |||
| Haeyang Energy | 300A 외 | |||
| Kyungnam Energy | 300A 외 | |||
| GSE | 200A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2021 | MP line stopping & by-pass, etc. | 206 sites | Haeyang City Gas | 400A 외 |
| Jeonnam City Gas | 400A 외 | |||
| Yeongnam Energy | 300A 외 | |||
| Chungbuk City Gas | 400A 외 | |||
| Wonju City Gas | 400A 외 | |||
| Yeongdong City Gas | 300A 외 | |||
| Sokcho City Gas | 300A 외 | |||
| Kyungnam Energy | 300A 외 | |||
| GSE | 200A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2020 | MP line stopping & by-pass, etc. | 219 sites | Haeyang City Gas | 400A 외 |
| Jeonnam City Gas | 400A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Chambit Group | 400A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2019 | MP line stopping & by-pass, etc. | 107 sites | Haeyang City Gas | 400A 외 |
| Jeonnam City Gas | 300A 외 | |||
| Yeongnam Energy | 300A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2018 | MP line stopping & by-pass, etc. | 112 sites | Haeyang Energy | 400A 외 |
| Jeonnam City Gas | 400A 외 | |||
| Yeongnam Energy | 400A 외 | |||
| Hyundai Steel, POSCO | 160A 외 | |||
| 2017 | MP line stopping & by-pass, etc. | 64 sites | Haeyang City Gas | 400A 외 |
| Jeonnam City Gas | 400A 외 | |||
| GSE | 300A 외 | |||
| 2016 | MP line stopping & by-pass, etc. | 41 sites | Kyungnam Energy | 400A 외 |
| Jeonnam City Gas | 400A 외 | |||
| GSE | 300A 외 | |||
| 2004 ~ 2015 | MP line stopping & by-pass, etc. | Kyungnam Energy83 sites | 400A 외 | |
| 1997 ~ 2004 | MP line stopping & by-pass, etc. | Kyungdong City Gas76 sites | 400A 외 | |
| Kyungnam Energy26 sites | 400A 외 | |||
| Seoul City Gas11 sitesSeoul City Gas — Subway Line 9 connection | 500A | |||
| Samchully City Gas24 L/S | 400A 외 | |||
| Daesung Energy62 L/S | 400A 외 |
※ For 1997–2015 the figures are cumulative per client; from 2016 they are annual totals.
Clients & Partners
Clients & partners
Utilities and contractors we supply equipment to, and the clients we perform service contracts for — as recorded in our 2026 company profile. Logos should be added only after written permission from each company.
LP/MP tapping machines & stopping equipment — delivered to
Equipment and consumables supplied
- CNCITY Energy (Daejeon)
- Haeyang Energy (Gwangju, Jeolla)
- Mokpo City Gas (Jeolla)
- Jeju City Gas
- Jeonnam City Gas (Suncheon)
- GSE (Jinju)
- Busan City Gas
- Kyungnam Energy (Changwon, Gimhae, Geoje, Miryang branches)
- Kyungdong City Gas
- Seorabeol City Gas (Gyeongju)
- Yeongnam Energy (Gumi, Pohang)
- Daesung Energy (Daegu)
- Chungbuk City Gas (Chungju)
- Wonju City Gas
- Gangwon City Gas (Chuncheon)
- ENS System
- Hyundai Steel (Gwangyang)
- POSCO (Gwangyang)
- Seongdo Industry and 19 other contractors nationwide
MP line stopping & by-pass equipment — delivered to
Large- and small-bore MP stopping equipment
- Kyungnam Energy HQ (Changwon) — large-bore MP stopping
- GSE HQ (Jinju) — large-bore MP stopping
- Yeongnam Energy Gumi — large-bore MP stopping
- Jeonnam City Gas (Suncheon) — small-bore MP stopping
- Haeyang Energy (Gwangju) — small-bore MP stopping
- Seorabeol City Gas (Gyeongju) — small-bore MP stopping
- ENS System, Hyundai Steel, POSCO and others
MP stopping & by-pass — service contract clients
Executed by JH E&S
- Haeyang Energy
- Yeongnam Energy
- Jeonnam City Gas
- Kyungnam Energy
- Jeju City Gas
- GSE
- Chungbuk City Gas
- Wonju City Gas
- Yeongdong City Gas
- Sokcho City Gas
- Seongdo Industry
- Hankuk Corp.
- Hyundai Steel
- POSCO and 14 others
Companies operating the same MP stopping & by-pass method
Same method, JH-built equipment
- Kyungnam Energy
- GSE
- Haeyang Energy
- Mokpo City Gas
- Kyungdong City Gas
- Yeongnam Energy
- Jeonnam City Gas
- ENS System
- Seongdo Industry
- Hyundai Steel
- POSCO and others
Need reference records for a comparable site? Just ask.
Hot Tapping & Line Stopping Equipment Manufacturing & No-Shutdown Pipeline Services