Category: Steel Manufacturer

Seamless pipe vs welded pipe

1. The difference in production process

Welded pipe: The steel plate or steel strip is used as raw material, and it is welded after being crimped by the unit and mold. According to different welding methods, it can be divided into straight seam welded pipe and spiral welded pipe.Seamless steel pipe: It is made by cold rolling, cold drawing or hot extrusion production process using round steel perforation as raw material.2. The difference on the outer surfaceWelded pipe: The steel pipe has high precision, uniform wall thickness, high brightness inside and outside the pipe, and can be arbitrarily cut to length; it can be used as a thin-walled pipe.Seamless steel pipe: The steel pipe has low precision, uneven wall thickness, low brightness on the inside and outside of the pipe, high cost of sizing, and there are pitting and black spots on the inside and outside that are not easy to remove. Usually the pipe wall is thick.3. The difference in performanceSeamless steel pipes are much higher than welded pipes in corrosion resistance and pressure and high temperature resistance.With the improvement of welded pipe manufacturing technology, the mechanical properties and mechanical properties are slowly approaching seamless pipes. In some aspects, welded pipes can replace seamless pipes.4. The difference in priceThe production process of seamless steel pipe is more complicated, and its price is more expensive than welded pipe.5. The difference in applicationSeamless steel pipe: It has a hollow section and is used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are used to make ring parts, which can improve material utilization, simplify manufacturing procedures, and save materials and processing. Working hours.

Welded pipe: its pressure-bearing performance is general, mainly used to transport water, oil, gas, air, and heating water or steam and other generally lower pressure fluids.

Tips:ASTM A53covers seamless and welded steel pipe with nominal wall thickness. The surface condition is usually black and hot-dipped galvanized. ASTM A53 is produced mainly for pressure and mechanical applications, and is also used for transport of steam, water, gas line pipes.

ASTM A53 ERW steel pipe is a typical carbon steel pipe(CS ERW pipe). It is largely used to convey fluids at low / medium pressures such as oil, gas, steam, water, air and also for mechanical applications.

Pine hardwood flooring can be a beautiful addition to any home. The material is cheaper than that of most hardwoods, and will last a lifetime. In addition, the installation process is not too difficult, so long as you use precut lumber. Once youve outlined precisely how much material you will need and have bought the precut floorboards, you are well on your way. In this article, we will outline the installation process. 1. Tools / Materials2. Drywall screws3. Shop Vac4. 1 inch finishing nails5. 8d finishing nails6. Hammer7. Saw8. Rosin PaperThe following steps need to be carried out:Step 1 Remove all baseboards and floor trim. Once this is accomplished, you will be able to remove the floor covering and underlayment, revealing the subfloor. Inspect for any squeaky panels and drive drywall screws into the joists directly below them. This acts to tighten and secure the board while eliminating that annoying squeak. Step 2 Roll out the rosin paper onto the subfloor. Start with the wall that is perpendicular to the floor joists. Every six inches, staple it down with 5/16 stables. Make the joists with a straightedge and overlap the rosin paper four to five inches. Continue marking each joist as your move along. Step 3 Evaluate your materials and choose the straightest and longests pine boards for the first row and line them parallel to the longest wall. Give a inch space between the wall and the floorboard. Each end should butt together over the floor joists. Once the first row has been cut and laid out, apply glue in squiggly lines to the board bottoms and nail each into place. Step 4 Predrill each hole into the wood roughly inch from the wall. Be certain that the board is able to get close enough to the wall so the baseboard and trim cover the heads of the nails. Use an 8d finishing nail to secure the board to the subfloor. Step 5 Drive your 1 inch finishing nails through the tongue of each panel at a forty five degree angle. Use a nail set in order to sink the heads 1/8 inch below the surface of the wood. Nail each board down into each joist as a means to secure them. Step 6 Measure the available space for the last row of boards. Allow for to inch of expansion space between the wall and wood. Cut these last boards in order to fit the space. Step 7 Inspect the area to see if it requires any sanding. Many floors do not, but all cases are different. If you decide to go for it, be sure to use a shop vac to clean the dust afterwards. Step 8 Finish your floor with your favorite varnish or stain and allow to dry.