Carbon steel Pipes

Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, niobium, molybdenum, nickel, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60.

Alloy Steel Pipes

Alloy steel pipes are made of alloy steel and hold excellent properties. These pipes are majorly favored because of their resistance to corrosion and oxidation. They are generally used for energy-related applications like oil and gas drilling and are subjected to stresses in machine parts. Alloy Steel Pipes are extensively used for conveyance of fluids intended for critical high temperature and general corrosion service applications.

Alloy Steel Pipes are also made use of in boiler tubes and heat-exchanger tubes and are available with different surface treatment options like pickled and annealed/polished, galvanized and others. Some of its features include option of different metal grades; application suitability in areas like water supply, chemical industry, aviation and others.

Stainless Steel Tubes

Stainless Steel is primarily used in piping system for the transport of fluids or gases , They are manufactured from steel alloy containing nickel as well as chrome, Which give stainless steel its corrosion resistant properties. Stainless steel pipe resists oxidation, making it a low-maintenance solution that is suitable for high temperature and chemical applications, because it is easily cleaned and sanitized, stainless steel pipe is also desired for applications involving food, beverages and pharmaceutical application.

Stainless steel pipe is commonly manufactured using a welding process or extrusion , Welded process involves shaping steel into a pipe shape and then welding the seams together to hold the shape , Extrusion creates a seamless product and involves heating a steel rod and then piercing it through the middle to create a pipe.

Special Shaped Tubes

Special shape steel pipe is a kind of economic cross section steel tube including non-circular cross section, equal-thickness wall, variable wall thickness, symmetrical section, no-symmetrical section, etc. Such as square, rectangle, conical, trapezoidal, spiral, etc. The special shape steel pipe is more suitable for the particular condition of use. And it can save metal and improve the labor productivity of parts and components manufacturing.

Special Material Tubes

Ningbo Danyal Pipelines CO.,Ltd supply all kinds of special material, such as Titanium, Stainless Steel, Copper, Nickel in different shapes like steel round bars, steel tubes, steel pipes and sheets and so on
with a wide variety of materials and full range of sizes ,according to international standards.


Flange is second most used joining method after welding. Flanges are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance in required during plant operation .
flanged joint is composed of three separate and independent although interrelated components; the flanges, the gaskets, and the bolting; which are assembled by yet another influence, the fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.


Pipe Fittings are piping component that helps in change the direction of flow such as elbows, tees, changes the size of pipe such as reducers, reducing tees, connect different components such as couplings and stop the flows such as caps
there are different types of pipe fitting used in piping , pipe fittings used in piping work are mainly elbow, tee, reducer, union, coupling, cap …..etc.