In front of Hyundai Engineering & Construction, Hyundai Engineering, Hyundai Heavy Industries, shipbuilding partners, and plant construction companies, our company held a demonstration of Orbital GMAW products on March 19, 21, and 1) plans to increase the application rate of automatic pipe welding 2) pipes Automatic welding plan for the first floor 3) To ensure the pipe industry’s competitiveness and economic viability, a briefing was arranged.
- Attendees: Hyundai Engineering & Construction, Hyundai Engineering, Hyundai Heavy Industries, shipbuilding partners, plant construction companies
- Date: March 19, 2021, 09:00~12:00
- Hold a briefing session
1) Measures to improve the application rate of automatic pipe welding
2) Automatic welding plan for the first layer of pipes
3) Measures to secure economic feasibility and competitiveness in the piping field - Demonstration
1) Orbital GMAW
- Automatic welding from the first layer, welding technique: GMAW
- The existing method is full manual welding using the manual GTAW+SMAW method.
- Increased productivity by more than 5 times compared to manual welding
- It is effective when applied to joints or large diameters that cannot rotate for field installation or shop production.
- Applicable to sizes 6" and larger, quantities less than 6" can also be applied using the equipment shown in the picture.
- Automatic welding can be applied to all diameters by appropriately utilizing orbitals.
2) Robot GMAW
- Automatic welding from the first layer, welding technique: GMAW
- Welding fumes and spatter are very low compared to existing manual welding methods such as SMAW (Arc) or FCAW.
- Spatter scatters and does not adhere to the base material, so there is no need for post-processing (other techniques include grinding)
- Productivity can be improved by more than 5 times compared to existing manual welding GTAW+SMAW
- Productivity can be improved by more than 2 times compared to GTAW+semi-automatic FCAW in the shipbuilding field
3) ArcTig
- For Stainless Steel, welding is completed in 1 pass up to 8mmt.
- Up to 8mmt welded with I Butt, over 8mmt welded with Y-Butt as shown in the picture, ArcTig up to 8mmt, remaining GMAW welded
- A high-efficiency process that can secure productivity more than 20 times that of the current manual TIG, with a welding speed of about 300mm/min.
- ArcTig is a Tig welding technique and belongs to process group 141 (ISO9096). If the Tig process is used, re-approval of the process is not required.
- However, machining and installation accuracy of both members is required (within 10% of the member thickness)
- Hyundai Samho Heavy Industries LNG stainless steel pipe application confirmed and equipment application scheduled for the second half of 2021
4) Finishing
- GTAW+SMAW, the main technique currently applied in the plant field, was developed during World War I in the 1010s and is currently used as the main welding technique in the plant field.
- In the case of semi-automatic FCAW applied in the shipbuilding field, it is a technique developed in the 1950s and produces a lot of welding fume and spatter, making the working environment very poor.
- There are many risk factors for the health of welders, and there are many restrictions on eco-friendly welding in the future (large amounts of CO2 gas are generated).
- In order to secure competitiveness, high-efficiency and high-quality welding techniques need to be verified and urgently applied to the field.
- Pipe welding requires highly skilled welders compared to other welding, and the supply and demand of welders is becoming increasingly difficult due to the aging of welders, higher wages, and young people avoiding learning welding skills.
- Due to the lack of organization and effort in related technology development by large companies and the poor environment of small and medium-sized companies, there are limits to the development and spread of technology in related fields. A lot of effort and urgent measures are needed to secure external competitiveness.