Circular hollow steel: D32.D38.D45.D51.D60.D70.D81.D92; hexagonal hollow steel: H22.H25.H28.H32.H35; Material: FF710.23CrNi3MoA.35SiMnMoV.55SiMnMo like. Geological pipe: Φ42.Φ50.Φ63.5.Φ73.Φ89 and supporting joint pipe material: R780.DZ50.DZ60.42CrMo etc. Shandong Peng Rui Drilling Technology Co., Ltd. was founded in 1992, is a design, development, production, sales and service as one of the professional manufacturer, the company's main products are: hexagonal hollow steel circular hollow steel, heavy-duty hydraulic drill rod material hollow steel drill rod, hollow bolt grouting materials, geological pipe, drill pipe trenches blast furnace brazing materials and finished opening brazing, horizontal spiral drill pipe, drill pipe Teng Ma, Kilometers special drill rig, drill bolt, screw anchor drill pipe, drill pipe ribs, efficient spiral drill pipe, exploring water gas exploration drill pipe, drill pipe, geological diamond drill, various drill bits, mining and other tools and equipment used. first-class production equipment, strong technical force, our company is located in Shandong to land, there is a century-old coal production Zibo, close to 205 National Road hexagonal hollow steel, location and convenient transportation. Mature manufacturing processes, advanced production and testing tools, is a reliable guarantee of product quality, after years of development, the company has products to diversify, series production, and established a strict procurement system, process control, storage and transportation, etc. scientific system to ensure to provide you with after sales service, new and old customers to return all the support and love. Business philosophy: the first service, the customer first, high quality and excellence. (3) good corrosion resistance. Currently, when Arbors Rod drilling operations in the open air, the use of orifice catching dust dry drilling, while the underground operations hollow steel, wet drilling. Drill Rod majority wet drilling. Threaded Rod bore capability by the high frequency of high stress and water (often with acidic water) combined effect of corrosion, which is a major factor in causing fatigue fracture in the drill rod, so the thread Rod must have good water corrosion . (4) high flatness and rigidity. Flatness and rigidity threaded drill rod is an important guarantee for obtaining high drilling efficiency. When drilling, drill rod to work in rotating state 250 r / min, if the flatness is low or insufficient rigidity, drill rod will work under the eccentric strike, while the loss of a part of the rock energy, on the other hand bending stress produced hollow drill steel drill rod, drill rod increases the chances of fatigue failure. Rod higher flatness, rigidity better, pass the higher the efficiency of drilling stress, the faster drilling. (5) good structural design. Threaded Rod is to pass a high-frequency high stress rods, sections can cause changes in component stress and stress concentration, the greater the change in cross-section, the lower the efficiency of stress transfer, and the failure stress was greater. Therefore, the design principles of good drill rod structure is: try to avoid or reduce cross section changes drama, using reasonable and slow changes in the transition section, choose the largest possible transition arc. Of course, higher precision, namely to improve the neutral and screwed interchangeability between the center of the different sections, with the gap decreases, reducing the roughness of the machined surface, etc., are beneficial to improving the life of drill rod rock drill rod with Hollow steel | hollow steel | Drilling Ltd. Shandong Peng Rui Peng Rui provided by Shandong Drilling Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) strong, credible, Shandong Zibo metal cutting and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Drilling Ltd. Shandong Peng Rui and you hand into the brilliant, for a better future!