Longitudinal steel seam welded pipes
|Terms of Trade:||FOB,CFR,CIF|
|Min. Order:||100 Piece/Pieces|
|Delivery Time:||30 Days|
|Packaging:||bulk package and bulk vessel transportation; frame container package and frame container transportation|
|Place of Origin:||china mainland(zhejiang)|
Model No.: USA-041
Straight pipe should be made mechanical performance test and flattening test, flaring test, and to meet the requirements. Steel pipe should be able to withstand a certain internal pressure, if necessary, 2.5Mpa pressure test, to maintain a minute without leakage. Eddy current testing is allowed to replace hydrostatic test.
Welding of Longitudinal pipe
Straight seam pipe generally high-frequency welding, high frequency welding is a kind of induction welding (or pressure contact welding), it does not need to weld filler, weld spatter, welding heat affected zone is narrow, beautiful welding molding, welding, the advantages of good mechanical performance, so in the production of steel by wide application. According to the principle of electromagnetic induction and the exchange charge in the conductor tends to skin effect and proximity effect and eddy current heat effect, the edge weld steel local heating to a molten state, through the roller extrusion, the butt weld the intergranular bonding, so as to achieve the purpose of seam welding, cooling after the formation of a strong straight seam welding.
Will strip into the welded pipe unit, by the multi-channel roller rolling, strip gradually rolled up, forming the opening gap circular tube billet, adjusting the extrusion roller pressure, weld gap control in 1 ~ 3mm, and the weld ends flush. If the gap is too large, resulting in a reduction in the proximity effect, the eddy heat is insufficient, the welding seam between the poor bonding and produce no fusion or cracking. Such as the gap is caused by proximity effect increases, large welding heat, resulting in weld burning, or weld by extrusion, rolling form the pit affecting weld surface quality.
Low carbon steel material, welding temperature control in 1250~1460 C, can meet the pipe wall thickness 3~5mm welding penetration requirements. Welding temperature is mainly controlled by adjusting the high frequency eddy current heat power and welding speed. When insufficient heat input by heating the weld edge is not up to the welding temperature, metal structure remains solid, the formation of fusion or incomplete penetration; when the heat input is too large, heating the weld edge over welding temperature, burn off or droplet, molten hole can be formed in the weld.
Besides above the general specifications, we can also supply some specific pipes and other similar steel structure as clients' requirements.
Package and shipping
bulk package and bulk vessel transportation
frame container package and frame container transportation
To produce our products with strict standards of military products
Our team have rich experience in military marine products with military standard.
Outstanding in multiple fields
Besides dredging and marine engineering, we are also specialized in providing comprehensive service of municipal engineering, mechanical engineering, oilfield projects and environmental remediation projects.
Assure for large production capacity with many advanced equipment
Integrate all resources, UniSite have large advanced equipment and is able to do most large products of marine products including pontoons
Bending machining, rolling machine with 150mm, SAW equipment, manual welding equipment, Laser Thermometer, Electrode dryer, cutting machine, milling machine, electrical element, big Welding roller stand, Box -type electric furnace, special inspection tools, lifting gantry 200T, 100T, floating crane 1200T-
With professionalism, vitality, innovation, respect, team spirit, UniSite culture (corporate values, corporate philosophy and behavior shaping) is continuously developing, along with our company from its foundation.
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Unisite Group Ltd.
UniSite group was established in 2008 in Ningbo - Chinese second largest port, dredging relevant products manufacturing & supplying since 2005, that is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.
As an international partner, we are specialized in providing comprehensive service of dredging, land reclamation, offshore projects, marine engineering, piling works, municipal engineering, mechanical engineering, construction machinery, oilfield projects and environmental remediation projects.
The group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient. Thanks to the knowledge, the experience and the skills of our work team, we are able to offer our client best possible and most sustainable solutions to their requirement. We are one of the leading steel parts and service providers for dredging and marine engineering in China.
UniSite culture consists of corporate values, corporate philosophy and behavior shaping, which is the core of responsibility and breakthrough. Based on this core, with professionalism, vitality, innovation, respect, team spirit, UniSite culture is continuously developing, along with our company from its foundation.
Activities and projects
1)UniSite`s first 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, oilfield projects and environmental remediation projects.
Steel Structures and Pipes
Casting and Pump parts
Machining Parts whatever big or small
Piling and Parts
- Pontoon; Floating platform; Marine work platform; Buoy; Float; Fender
- Anchor box system;
- Sinker pipe line; Shore pipe line; Floating pipe line; Piling pipe; Sheet pile;
- Y piece; Bend; Fall pipe; Ball joint pipe;
- Rubber hose;
- Small dredger: standard cutter suction, bucket, grab, shovel stone, mud and stone construction
- Spud; CSD Spud;
- Suction pipe; Arm piece; Jet pipe;
- DW pipe; Wear resistant pipe; Structure pipe; Shipping building pipe;
- Pump; Pump spare parts(impeller, shell, casing, liner, cover)
- Branch casting pipe; Casting bend;
- Loading box; Bottom door; Overflow; Fender frame; Bow coupling; Anchor; Hopper panel; Basket; Bucket; Clamp ring; Drag head; Cutter head; Cutter ladder;
- Sliding piece; Gantry; Turning gland; Chute flap; Kingpin; Cutter platform; Water box; Bow coupling; Anchor; Hopper panel; Hopper door; Basket; Bucket; Bucket wheel; Clamp ring; Close plate; Gantry;Dredge gate valve; Valve body;
- Mooring system(mooring rope, mooring bollard, mooring winch, mooring fairlead, anchor windlass, chain stopper, roller fairlead, wheel fairleader, panama chock, marine mooring rope reel, anchor releaser, marine shutter, pipe clamp)
2) UniSite`s second core activity: serve for machinery and automobile projects
Provide service and relevant parts for mechanical engineering, construction machinery, agricultural machinery, port hoisting machinery, metallurgy, automobile, chemical, marine machinery.
Big Machining(machining center, boring and milling, lathe)
Small Machining(cnc, milling, grinding)
Casting (sand, investment)
Stamping and Bending
- Machinery Products(like Wind Turbine Generate System Hub, Wind Power Bearing Block, Punching Machine Sliding Block, Punching Machine, diesel power generator base, die casting machine base, injection molding machine base, punch, tank, pump parts, accumulators parts, valve parts, construction parts, agricultural parts etc.)
- Machinery Products
- Auto Products
- Shipping building Products
- Medical Products
- Oil Products
With about 10 years` experience, now our products and service are involved in many projects all over the world. Like:
1)Palm islands construction, World thousand islands construction, Australian coastline and port expansion, Gladstone project construction, Brisbane airport project construction, the Vietnamese government`s port expansion, Panama coastline expansion, Railway tunnel Schuman-Josaphat construction(Belgium), World`s first formal floating sea restaurant construction(Darling Harbour, Sydney), New Suez Canal project construction, Municipal tunnel projects construction(Alger)--
Production and equipment
pipeline production equipment
bending press equipment
CNC plasma cutting equipment
advanced paint room and equipment
Technology and Quality
Offering our client best possible and most sustainable solutions to their requirement. Production procedure
Step1: Drawing and technical requirement analysis, production lofting;
Step2: Material cutting, trimming, groove, cleaning, bending, rolling, dimension & NDT inspection
Step3: From part assemble to whole assemble with accurate template and platform, dimension & NDT inspection, welding, dimension & NDT inspection;
Step4: Casting, forging, stamping, machining if necessary
Step5: Final dimension & NDT inspection;
Step6: Surface treatment;
Step7: Package, Loading and Lashing when delivery;
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
In order to perform comprehensive service and relevant items to clients' satisfaction, UniSite knows the importance of advanced technology, equipment, quality and continuously invests in advanced production base and equipments. The group has a perfect managing system and quality control system which from initial work, to process control, to final control, forming the whole process traceability with a good command of quality and production schedule.
We are able to offer our client best possible and most sustainable solutions to their requirement.
- Company Name: Unisite Group Ltd.
- Representative: Yu ZHUOFANG
- Product/Service: Dredging Parts , Marine Engineering And Parts , Ship Building And Parts , Machining Parts , Casting And Pump Spare Parts , Piling Parts
- Capital (Million US $): 1,500,000
- Year Established: 2008
- Total Annual Sales Volume (Million US $): US$10 Million - US$50 Million
- Export Percentage: 91% - 100%
- Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
- No. of Production Lines: 6
- No. of R&D Staff: 5 -10 People
- No. of QC Staff: 11 -20 People
- OEM Services Provided: yes
- Factory Size (Sq.meters): 10,000-30,000 square meters
- Factory Location: JiaoTou industry park, LiuHeng island, Putuo district, Zhoshan
- Contact Person: Mr. Kevin Mei
- Tel: 86-574-87053650
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