Welding
DouHun Engineering Specializes in pressure welding of any common materials used throughout different industries such as inconel, nimonic, titanium and magnesium alloys, as well as the more common materials used throughout the industry. We are dedicated to delivering the best results for our clients, our team is equipped with the reliable tools and equipment and we are trained for the latest welding techniques to carry out our work.
Piping Systems
DouHun have years of experience in supplying, fabricating and installing piping systems for Perth. Our reputation for reliability and quality amid our customer base are well founded. We are always ready to take that extra step in order to reaffirm our reputation.
Our full range of piping products and services and manufactured to international standards, and delivered by reliable suppliers. This comprehensive selection caters for oil. Gas and other process industries. The range of pipeline pigs available included foam pigs, mandrel pigs, spheres and special cleaning pigs. Technical and engineering expertise means that we are able to offer a range of cleaning pigs custom made to the specific requirements of a pipeline; meaning there is no need for a generic or ‘nearest fit’ product.
We assess our work to the highest level of quality control, minimizing defects and delays. Detailed inspections are carried out at every stage of production to ensure that every specification and requirement is fulfilled.
DouHun is able to supply, fabricate, site install and test complete piping systems. We can meet clients’ piping requirements utilizing 3-D computer modeling, isometrics, drawings or specifications. Factory and site inspections are routinely conducted to help in the development of efficient and reliable piping systems..
DouHun arranges purchase of piping systems (fittings, valves, pumps, bolts, gaskets, supports and the pipes themselves) on behalf of the client. We use large and reputable companies to ensure high quality and reliability. Quality products and our quality workmanship make for projects of superior standards.
Common materials include:
- Mild steel Piping sch 40 and upwards ERW and A106
- Stainless Steel Piping sch 5, sch 10, sch 40, sch 80
- Chrome Molly Piping sch 40 upwards
Step by step
- Drawing review or site measure
- Materials and procurement lists
- Butt weld and site weld counts
- Creation of cutting and materials lists
- Cleaning and inspection of items
- Mark and measure materials for processing
- Cutting and preparation of materials
- Fabrication of specific items to isometric or site measured drawings
- Inspection of pre weld joints
- Welding of butts and fillets
- Cleaning of welded areas
- Welder ID and Traceability for NDT and weld maps
- Marking of pipes as per client or site install requirements
Welding Process most common
- GTAW ( Gas Tungsten Arc Welding ) or TIG
- MMAW ( Manual Metal Arc Welding ) or STICK
- GMAW ( Gas Metal Arc Welding ) or MIG on large bore piping