Model No.: USA-050
Dimension: As Per Drawing/order
Inspection: Material, Construction, Dimension, Welding Seam, N
Grade: 10#-45#, Q195-Q345, X42-X80, L245-L255 Or Other Ma
Standard: API 5L, BS 1387, GB/T 3091-2001, GB/T9711, ASTM A5
Certificate: API BV
Application: Marine Steel Structure And Dredging Field And Oil
Tolerance: High Accuracy(ISO2768, ISO5817, ISO13920); Detail:
Surface: Sa2.5 Blasted And Two Or Three Layers Painted With
Welded Carbon Straight Saw Pipe: Welded Longitudinal Saw Pipes
Packaging: bulk package and bulk vessel transportation; frame container package and frame container transportation
Place of Origin: china mainland(zhejiang)
Performance advantages of heat preservation and corrosion protection and double side submerged arc welded pipe:the heat preservation performance is good, the heat loss is only 25% of the traditional double side submerged arc welded pipe, the long-term operation can save a lot of energy, reduce the energy cost significantly;has a strong waterproof and corrosion resistance, without attached pipe trench, can be directly buried in the ground or water, construction is simple and rapid and low cost;
the double face submerged arc welded pipe has good corrosion resistance and impact resistance at low temperature, and can be directly buried in the ground.
Basic information of SAW
Submerged arc welding (SAW) is a common arc welding process. The first patent on the submerged-arc welding (SAW) process was taken out in 1935 and covered an electric arc beneath a bed of granulated flux. Originally developed and patented by Jones, Kennedy and Rothermund, the process requires a continuously fed consumable solid or tubular (metal cored) electrode.The molten weld and the arc zone are protected from atmospheric contamination by being "submerged" under a blanket of granular fusible flux consisting of lime, silica, manganese oxide, calcium fluoride, and other compounds. When molten, the flux becomes conductive, and provides a current path between the electrode and the work. This thick layer of flux completely covers the molten metal thus preventing spatter and sparks as well as suppressing the intense ultraviolet radiation and fumes that are a part of the shielded metal arc welding (SMAW) process.
SAW is normally operated in the automatic or mechanized mode, however, semi-automatic (hand-held) SAW guns with pressurized or gravity flux feed delivery are available. The process is normally limited to the flat or horizontal-fillet welding positions (although horizontal groove position welds have been done with a special arrangement to support the flux). Deposition rates approaching 45 kg/h (100 lb/h) have been reported - this compares to ~5 kg/h (10 lb/h) (max) for shielded metal arc welding. Although currents ranging from 300 to 2000 A are commonly utilized, currents of up to 5000 A have also been used (multiple arcs).
Single or multiple (2 to 5) electrode wire variations of the process exist. SAW strip-cladding utilizes a flat strip electrode (e.g. 60 mm wide x 0.5 mm thick). DC or AC power can be used, and combinations of DC and AC are common on multiple electrode systems. Constant voltage welding power supplies are most commonly used; however, constant current systems in combination with a voltage sensing wire-feeder are available.
UniSite have a perfect managing system and quality control system which from initial work.
ISO9001-2008/CCS; BV manufacturer capability qualification.
Taken part in the CHINA DREDGING ASSOCIATION
Quality, health, safety and environment (QHSE)
In-house safety training to our staff
Checking all the production equipment periodically
Preventing pollution, accidents and health hazards, auditing
Photos of our Welded carbon straight Saw Pipe
UniSite`s core activity: serve for dredging and marine projects .Provide service and relevant parts for dredgers, including Dredger construction, repairing and maintenance.Provide items for dredging, land reclamation, offshore, marine engineering, piling works, municipal engineering, mechanical engineering, oilfield projects and environmental remediation projects.
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