Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


interpret seamless steel pipe

I am Diary Planet 110 star baby Wenjuan, who is participating in the writing training of Sun’s Diary Planet 21-day metamorphosis tour. This is my 30th original diary. I insist on writing an original diary of more than one hundred words per day. I hope to record my persistence in 2017, giving up is easier than insisting, and accomplishing is more important than perfection!

We are a professional manufacturer of seamless steel pipes. It has been producing seamless steel pipes for 11 years. I am soaking in the "small world" of steel pipes every day. The most contacted thing every day is seamless steel pipes, so I know how to deal with them. A lot of little knowledge about seamless steel tubes.



Let me talk about the definition of steel pipe. The steel pipe has a hollow section and is used as a pipe for transporting fluids, such as pipes for transporting oil, natural gas, gas, water and certain solid materials. Since the area of the circle is the largest under the condition of equal circumference, more fluid can be transported by the circular tube. In addition, when the circular section is subjected to internal or external radial pressure, the force is relatively uniform, and therefore, the majority Round pipe when steel pipe.


Let's talk about the classification of our seamless steel tubes. Due to the different manufacturing processes, our seamless steel tubes are divided into hot-rolled seamless steel tubes and cold drawn (rolled) seamless steel tubes. The raw material of the hot-rolled seamless steel pipe is a round tube blank, which is cut and processed, sent to a furnace for heating, and the billet is heated into a furnace, and the temperature is about 1200 degrees Celsius. After the round billet is discharged, it is perforated by a pressure punch. The inner diameter of the steel pipe is determined by the outer diameter of the sizing machine drill bit. After the steel pipe is sized, it is cooled by water spray. The steel pipe is straightened after being cooled, and the steel pipe is straightened and then tested (or hydrostatic test). After the quality inspection of the steel pipe, it must be carefully selected by hand. After the quality inspection of the steel pipe, the number, specification and production batch number of the paint can be used to enter the warehouse. A perfect batch of seamless steel tubes is produced.


The hot-rolled seamless steel pipe produced by our factory has a good surface, the pipe is relatively good, and the steel pipe produced by the hot rolling process, the bubbles, cracks and looseness formed inside the pipe body can be welded at high temperature and high pressure. Basically, most of the customers who have cooperated with us for a long time are very much in agreement with the seamless steel pipes produced by our hot rolling process. Every day we have two large workshops. The workers are divided into six classes to manufacture seamless steel pipes for hot rolling. Our seamless steel pipes are produced and delivered within the time limit signed by the customer. Therefore, many customers are very confident in the delivery of our factory within the production guarantee period. It is also the reason for our cooperation with us. One.


Of course, there are many reasons for cooperation with us. The quality of the products and the perfect after-sales service are very important reasons. How to do our product quality and after-sales service, the next time we explain.

This is my 30th original diary, I believe that the accumulation of the power of the stone!


Grateful to meet, I am Wenjuan, specializing in the production of small-diameter seamless steel tubes for 11 years, maintaining a true rate of 100% for 11 consecutive years, mainly producing 20#, 45#, 16mn, 40cr small-diameter seamless steel tubes, precision seamless steel pipes.  

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