Butt Weld Pipe Fittings, Pipe Flange, Steel Pipe
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    1. Butt Weld Pipe ElbowWe have six pipe elbow production lines including four carbon steel lines and two alloy steel lines, which greatly facilitate the large-scale production according to materials and specifications.
      Four double-end elbow beveling machines greatly enhance the productivity and machining precision, in the meanwhile, much processing cost is saved.
    1. Butt Weld Pipe BendPipe bend is a common fitting used to change the direction of the pipeline. There are two major groups of 3D and 5D types based on different radiuses. In terms of materials, products are divided into carbon steel and alloy steel.
    1. Butt Weld Steel Pipe TeePipe tee is applied to connect three pipes in a pipeline system. The product is made by extruding seamless steel pipe using one-step forming method. Pipe tee normally falls into two classes, straight tee and reducing tee. In addition, three different materials are available that are carbon steel and alloy steel.
    1. Butt Weld Steel Pipe ReducerPipe reducer offers connection for two pipes with different diameters, which makes it an indispensable component in pipeline system. We provide two types of pipe reducer, concentric reducer and eccentric reducer. In terms of different materials, we also have carbon steel reducer and alloy steel reducer.
    1. Butt Weld Pipe End CapPipe cap is a necessary accessory in pipeline system to cover the end of the pipe. We provide carbon steel cap and alloy steel cap. We have two pipe cap press machines with different working pressure, one is 100 tons and the other is 500 tons. They can produce pipe caps ranging from 1/2" to 64".
    1. Weld Neck FlangeAmerican series: ANSI B 16.5-2009, API 605-1988, MSS SP 44-2006
      European series: EN 1092-1-2007, BS4504-3.1-1989, DIN2630, DIN2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638..
      Japanese series: JIS B2220, JIS G3451, JIS B2238.
    1. Plate FlangeCarbon steel: A105, A105N, SS400, ST 37-1, ST 37-2, P245GH, P265GH.
      Alloy steel: A182 F1, F2, F5, F9, F10, F91, F92, F122, F911, F11, F12, F21, F22, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8. .
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    1. Blind FlangeAmerican series: ANSI B 16.5-2009, API 605-1988, MSS SP 44-2006
      European series: EN 1092-1-2007, DIN2527
      Japanese series: JIS B2220, JIS G3451, JIS B2238.
      Russian series: GOST 12815, GOST 12836
    1. Socket Weld FlangeCarbon steel: A105, A105N, SS400, ST 37-1, ST 37-2, P245GH, P265GH.
      Alloy steel: A182 F1, F2, F5, F9, F10, F91, F92, F122, F911, F11, F12, F21, F22, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8.
    1. Slip On FlangeCarbon steel: A105, A105N, SS400, ST 37-1, ST 37-2, P245GH, P265GH.
      Alloy steel: A182 F1, F2, F5, F9, F10, F91, F92, F122, F911, F11, F12, F21, F22, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8.
    1. Threaded FlangeCarbon steel: A105, A105N, SS400, ST 37-1, ST 37-2, P245GH, P265GH.
      Alloy steel: A182 F1, F2, F5, F9, F10, F91, F92, F122, F911, F11, F12, F21, F22, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8.
    1. Groove Steel FlangeGroove steel flange is a specially processed flange with grooves on the surface or inner circle of the flange. It can be specially made to suit your requirement according to the given design drawing.
    1. Seamless Steel PipeSeamless steel pipe is a strip hollow steel tube without any weld joint on the surface, which makes it able to suffer more pressure than welded steel pipe. This product is more durable in performance and enjoys a longer lifespan. Up to now, it has been broadly applied in offshore platform, boiler, as well as transportation of water, petroleum, natural gas and others.
    1. ERW Steel Pipe, Electric Resistance Welded PipeERW Pipe (Electric Resistance Weld) is manufactured by rolling a steel billet or steel belt into a tube then welding it with high frequency currents. Due to the simple processing method and cheap raw materials, this product is a very economical type and is most popular in the market. It is generally seen in ...
    1. LSAW Steel Pipe, Longitudinal Submerged Arc Welded PipeLSAW pipe (Longitudinally Submerged Arc Welding) is basically formed by pressing or rolling a single piece of medium-thickness steel plate into a pipe billet by mould or forming machine and is subsequently merged longitudinally (externally and internally) by submerged arc welding followed by expansion of pipe diameter.
    1. SSAW Steel Pipe, Spiral Submerged Arc Welded PipeSSAW Pipe (Spirally Submerged Arc Welding) is made of steel band by rolling it into pipe billet at a certain spiral angle (named roll formed angle) then is submerged arc welded. With this method, a narrow steel band can be formed into a large diameter steel pipe which can be applied in construction areas such as billboard column and bridge ...
    1. Stainless Steel PipeOutside diameter: 6mm~762mm
      Wall thickness: 0.5mm~50mm
      Length: 3m~12m
    1. Galvanized Steel PipeGalvanized pipe is made by applying a protective coat of zinc onto both inner and outer surfaces of a regular carbon steel pipe or seamless steel pipe using hot-dip galvanizing process, in order to prevent corrosion and prolong working hours. DH provides hot galvanized pipe including seamless galvanized pipe and welded galvanized pipe.

Main products of DH
We provide various butt weld pipe fittings, pipe flanges and steel pipes, including 45 deg pipe elbow, 90 deg pipe elbow, 180 deg pipe elbow, straight tee, reducing tee, concentric reducer, eccentric reducer, pipe cap, weld neck flange, plate flange, blind flange, socket weld flange, slip on flange, threaded flange, groove steel flange, cold-drawn seamless steel pipe, hot-rolled seamless steel pipe, ERW steel pipe, LSAW steel pipe, galvanized steel pipe and alloy steel pipe.

Features and applications
DH mainly produces pipe accessories and steel pipes that are frequently used in pipeline transportation for various liquids and gases such as petro, water, steam, natural gas and others. Now our product has been widely applied in multiple high-tech projects like petro supply, gas supply, electricity supply, chemical industry, shipbuilding, boiler, pressure vessel and offshore drilling platform.

Product advantage
DH introduces advanced quality management system from Korea and also employs sophisticated production equipment and inspection equipment. Additionally, our internal product specifications all exceed international standards. With these outstanding features, DH provides customers with top-quality product in China.

Quality control of product quality and raw materials
The entire raw materials are purchased from reputable seamless steel pipe manufacturers including Tianjin Pipe Corporation (TPCO) and Yantai Steel Pipe Corporation to ensure satisfying material quality. Plus, every procedure is specially assigned to employees. So whenever a quality problem occurs, we can trace to the source quickly and accurately. In this way, such problems will be completely eliminated.