Applications

Pressure vessels and boilers bear extremely high risks to life and property, with industry standards at a "zero‑tolerance" level. The core pain points are as follows: 100‑percent qualification rate for X‑ray inspection must be guaranteed; hydrogen‑induced delayed cracks tend to occur easily during multi‑layer and multi‑pass welding of thick plates; for thin‑plate liquefied petroleum gas (LPG) cylinders, brittle cracking is highly likely to take place in hydrostatic burst tests if mismatched‑strength welding consumables are adopted.

Long‑distance transmission pipelines (spiral‑weld pipes and longitudinally submerged‑arc welded pipes) operate under the harshest service conditions on Earth (extreme cold, high pressure, and corrosion). Steel pipe materials are continuously upgraded to high‑strength steels (API 5L X60, X70 and even X80). The core pain point is: while guaranteeing the multi‑wire high‑speed welding efficiency of pipe mills, it is mandatory to strictly maintain deep‑cryogenic impact energy from ‑40°C to ‑60°C (e.g., above 27J or even 50J), and expensive alloying elements must never be burnt out.

The core demand of steel structure manufacturers (especially PEB light‑steel and H‑beam workshops) is "cost reduction and efficiency improvement". The biggest pain points for factories are low welding speed (prone to undercut) and heavy labor consumption for post‑weld slag removal. In addition, steel plates in workshops often lack thorough grinding and carry mill scale or slight rust, which readily causes dense porosity.

Shipbuilding involves extensive two‑wire/three‑wire submerged‑arc welding for plate splicing, which demands extremely high deposition efficiency and resistance to wind‑wave fatigue loads. Offshore platforms operate under far harsher service conditions. Exposed long‑term to deep‑sea corrosion and low‑temperature alternating stress, they set stringent thresholds for welding consumables in terms of tensile strength, cryogenic toughness, and official certification from major classification societies (ABS, DNV, LR, etc.).