The main difference between welded pipe nipple and seamless pipe nipple is that the raw materials are different, which leads to their different pressure bearing capacity.
1. What Is A Welded Pipe Nipple?
Welded pipe nipples are made of welded steel pipe which formed from an originally flat piece of carbon steel or stainless steel. And The piece of carbon steel or stainless steel is rolled and welded creating a welded seam going long ways down your piece of steel tubing or piping. The weld is formed by using a high energy source to melt the local metal together.
Welded steel pipe, also called welded pipe, is a steel pipe made by welding a steel plate or strip of steel after crimping. The length is generally 6 meters. Welded steel pipe production process is simple, high production efficiency, variety specifications, equipment investment, but the general strength is lower than the seamless steel pipe. The presence of any seam on a welded pipe acts as a weak point, however, if the tube is seamless, it tends to be solid and overcome various industrial forces and pressures while in operation.
2. What Is A Seamless Pipe Nipple?
Seamless pipe nipples are made of seamless steel pipe which also referred to as drawn piping starts with a solid bar or block of carbon steel or stainless steel. And The piece of steel pipe is then put through a process of drilling, extrusion, or oxygen lance to create a hollow pipe. Once the tubing is hollow it is then placed through a die and mandrel phase to create a larger interior diameter providing various sizes of seamless steel tubing.
Seamless steel pipe is made of a single piece of metal and has no jointed steel pipe on the surface, which is called seamless steel pipe. According to the production method, the hot rolled tube, the cold rolled tube, the cold drawn tube, the extruded tube, the top tube, and the like are seamlessly divided. According to the cross-sectional shape, the seamless steel tube is divided into two types: round and irregular, and the special-shaped tube has a variety of complex shapes such as square, oval, triangular, hexagonal, melon-shaped, star-shaped, and finned tubes. The maximum diameter is 650mm and the minimum diameter is 0.3mm. According to different uses, there are thick-walled tubes and thin-walled tubes. Seamless steel tubes are mainly used as petroleum geological drilling tubes, cracking tubes for petrochemical industries, boiler tubes, bearing tubes, and high-precision structural steel tubes for automobiles, tractors, and aviation.
Seamless steel pipe has better pressure capacity, strength is higher than ERW welded steel pipe. So it is widely applied in high-pressure equipment, and thermal, boiler industries.
Generally, the welding seam of the welded steel pipe is the weak point, the quality affects overall performance.
In general, welded steel pipes can withhold 20% less working pressure than seamless ones. This reliability is the prime factor why people go for seamless steel pipes. As a matter of fact, all the industrial pipelines are done with seamless pipes only because the pipes undergo extreme thermal, chemical, and mechanical workloads. Welded pipes are more preferred in aerospace, automobile, and electronics industries where the budget is comparatively low, and so is the work pressure put on the pipes.
3. The Differences Between Welded Nipples And Seamless Nipples
- In appearance, the difference between seamless pipe nipple and welded pipe nipple is that there are welding ribs on the inner wall of the welded nipple, but the seamless nipple is not.
- The seamless nipples have higher pressure resistance. The welded nipples are generally about 10 MPa. Now the welded nipples can be seamless treatment.
- Seamless pipe nipples raw material seamless steel pipe is formed at one time during rolling. Welded pipe nipples raw material welded pipe needs to be welded after rolling, generally spiral welding and direct welding. The performance of seamless pipe nipples is better, of course, the price is higher.
- Because the seamless pipe nipples and the welded pipe nipples have different pressure-bearing capabilities, the seamless nipples can be used for various liquid and gas pipelines, and the welded nipples are used for low-pressure fluid transmission pipes, such as water, gas, and heating pipes.
Hebei Sanvo is a quality pipe fittings manufacturer and supplier in China, exporting a variety of threaded steel pipe fittings are made of carbon steel or stainless steel. And there are carbon steel pipe nipples, stainless steel pipe nipples, carbon steel pipe couplings, stainless steel pipe couplings, and stainless steel threaded pipe fittings. If you are interested in pipe nipples or other threaded pipe fittings, please do not hesitate to contact us. Hebei Sanvo welcomes your inquiry.
