NXF UNS NO7718/2.4668/NiCr19NbMo/alloy 718 DN15-1200 Thickness SCH10-XXS Nickel Alloy 718 Round Pipe Tube

1. Raw Material Checking and Cutting

The whole production process of round pipes begins with strict raw material inspection. Manufacturers check the steel grade, wall thickness, outer diameter, surface condition and straightness of original pipe blanks. Raw materials with cracks, heavy rust, deformation and uneven thickness are strictly rejected. After qualification, the round pipes are cut into fixed sizes according to production requirements. The cutting end faces are kept flat and vertical, and primary burrs are removed to ensure uniform specifications for subsequent processing.

2. End Face Finishing and Deburring

This procedure is to improve the precision and assembly performance of round pipes. The cut pipe ends are finely polished and trimmed to eliminate irregular edges, cutting scratches and sharp burrs. Both the inner and outer edges of the pipe mouth are processed smoothly to prevent scratching hands and sealing parts during assembly. Meanwhile, all residual impurities on the pipe surface are cleaned to create a clean base for later welding, threading or butt connection processes.

3. Precision Shaping and Straightening

After cutting and finishing, round pipes are sent to straightening and shaping equipment. During production, long-distance transportation and cutting may cause slight bending or oval deformation. Operators calibrate the pipe roundness, straightness and outer diameter tolerance through mechanical shaping. This step ensures the overall pipe body is smooth and regular, meets standard dimensional accuracy, and avoids assembly deviation and stress concentration in subsequent installation.

4. Welding and Forming Processing

For seamless welded round pipes, professional butt welding and seam forming processes are carried out in this stage. According to different pipe materials and wall thicknesses, matched welding parameters are adopted to ensure full penetration and firm combination of pipe joints. The welding seam is leveled and trimmed after welding to eliminate welding beads, spatter and raised traces. The whole process ensures the integrated forming of the round pipe with consistent structural strength of the pipe body.

5. Surface Anticorrosion and Finishing Treatment

After forming, all round pipes undergo standardized surface treatment. The process includes overall oil removal, rust removal, cleaning and drying. Carbon steel round pipes are treated with galvanizing, painting or anti-rust oil coating, while stainless steel pipes are polished and passivated. The surface treatment can effectively isolate air and moisture, improve corrosion resistance and wear resistance, and greatly extend the service life of round pipes in various working environments.

6. Dimensional Inspection and Finished Packaging

Before delivery, all finished round pipes need comprehensive quality inspection. Inspectors use calipers, micrometers and straightness detectors to check pipe diameter, wall thickness and overall dimensional accuracy. Surface appearance, welding seam quality and anti-corrosion effect are fully checked. Unqualified products will be reprocessed or corrected. Qualified round pipes are sorted by specifications, bundled and packaged strictly to avoid collision damage during transportation and storage.