One: Russian Pinus sylvestris is about twice as long as New Zealand pine, so the two are denser than the pine wood, and the grain is fine lines; New Zealand pine has a long life, loose material, and the texture is wide and easy to break. This is the difference in tree species. The radiata pine laminate is likely to be one of the main tree species for imported wood this year and in the next few years. Which one is better depends on the wood processing (such as the drying process and moisture content), the processing technology of the factory, the style, etc. Chile and New Zealand introduced this species in the 19th century. The characteristics of radiata pine are yellowish color, straight texture, easy to dry, small deformation, medium mechanical strength, good processing performance, suitable for making furniture and various wood products. . Second, Russian pine: and China's Northeast pine is a kind, but the national border is different. If it is said to use Russian pine, there is no need to import. The color of Pinus sylvestris var. mongolica is yellowish, oily, and easy to crack. The biggest difference in color difference is that it is easy to change color. The surface of Pinus sylvestris var. mongolica is blue-green at the initial stage, and the surface of the middle part is blue-black. In the later stage of color change, the wood is light black and the 50mm thick plate is transparent. Third, the radiata pine has small knots; small oiliness; small deformation; good color; good toughness; good texture; these are incomparable to Pinus sylvestris. SPF - Spruce Pine Fir Sheet SPF is a combination of commercial softwood species from Canada. Because of their approximate physical properties, the species are packaged and sold on the market. The SPF is obviously white wood. The wood looks bright and clean, and the color varies from white to light yellow. The texture is fine and smooth, and the texture is smooth. It has a high strength-to-weight ratio and is known for its excellent handling properties. It is very good for nailing and nailing, and it is easy to handle by hand and power tools. Excellent adhesion, painting and coloring properties. Kiln dry wood is used as a structural frame material in all types of buildings: residential, commercial, industrial and agricultural. Coniferous trees are slender leaves such as needles, mostly evergreen trees, the material is generally soft, and some contain resin, so it is also called soft material, such as: Korean pine, Pinus sylvestris, larch, spruce, fir, hemlock, Chinese fir, cypress, Yunnan pine, Pinus armandi, Pinus massoniana and other conifer species. Coniferous species grow slowly, have a long life span, and have a wide range of adaptation. Most species form coniferous forests or mixed forests of needles and broadleaves in various forest areas, which are the main materials and greening trees for forestry production. New Zealand radiata pine material introduction and the advantages and disadvantages of furniture. Classification of radiated pine: Wood can be divided into two categories: coniferous trees and broad-leaved trees. Chinese fir and various pines, spruce and fir are conifers; eucalyptus, ash, citron, eucalyptus and various birch, nanmu and poplar are broad-leaved trees. There are many species of trees in China, so the wood species commonly used in engineering in various regions are also different. In the northeastern region, there are mainly Korean pine, larch (Huanghuasong), fish scale spruce, red spruce, and ash. The Yangtze River Basin mainly includes Chinese fir and Pinus massoniana. In the southwest and northwest, there are mainly fir, spruce and hemlock. The structural trunk of radiata pine consists of bark, forming layers, xylem (ie wood) and medulla. The annual ring surrounding the medulla can be seen from the xylem of the trunk cross section. Each round is generally composed of two parts: The light color part is called early wood (spring material), which grows in the early season, the cell is larger and the material is sparse; the dark part is called the late wood (autumn), Growing in the late season, the cells are smaller and the material is denser. Some wood, in the middle of the trunk, is darker in color and is called heartwood; at the side, it is lighter in color and is called sapwood. The coniferous tree material is mainly composed of tracheid, wood ray and axial thin-walled tissue, and the arrangement is regular and the material is relatively uniform. The broad-leaved tree material is mainly composed of ducts, wood fibers, axial thin-walled tissues, wood rays, etc., and the structure is complicated. Since the cells constituting the wood are oriented, the difference between the grain and the grain is formed. The horizontal stripes can be distinguished by a radial direction consistent with the wood rays; a chord direction perpendicular to the wood rays. Coniferous trees generally have tall trunks, straight texture, easy processing, easy drying, less cracking and deformation, and are suitable for structural materials. Some broad-leaved trees have a hard texture, beautiful texture and are suitable for decoration. Radiation pine definition: Radiation pine is a kind of coniferous plant (common coniferous plants are pine, fir, cypress), which has a pine scent, pale yellow, sputum, fast reflection to atmospheric temperature, easy to swell, It is extremely difficult to naturally dry and other characteristics, so it needs to be manually treated, such as drying, degreasing to remove organic compounds, bleaching the uniform tree color, neutralizing the tree, making it difficult to deform. The moisture content of radiated pine refers to the percentage of water in the wood that accounts for the weight of the dried wood. The moisture in the wood can be divided into two parts, one part is in the cell wall of the wood cell, called adsorption water; the other part exists between the cell cavity and the cell gap, called free water (free water). When the adsorbed water reaches saturation and there is no free water, it is called the fiber saturation point. The fiber saturation point of wood varies from tree to species, ranging from 23 to 33%. When the water content is greater than the fiber saturation point, the effect of moisture on the properties of the wood is small. As the water content decreases from the fiber saturation point, the physical and mechanical properties of the wood change. Wood can absorb or evaporate water in the atmosphere, and adapt to the relative humidity and temperature of the surrounding air to achieve a constant water content, called equilibrium moisture content. The equilibrium moisture content of wood varies with regions, seasons and climate, and is between 10 and 18%. Radiated pine density: refers to the weight of wood per unit volume. The weight and volume of wood are affected by the moisture content. The ratio of the dry weight of the wood sample to its volume when saturated with water, the volume after drying and the volume at the time of drying is referred to as the basic density, the dry density and the dry density. The ratio of the weight of wood after air drying to the volume after air drying is called the air dry density of wood. Wood density varies with tree species. Most woods have an air dry density of about 0.3 to 0.9 g/cm3. Wood with high density generally has a high mechanical strength. The radiative pine wood shrinks and expands when it absorbs water, and shrinks when it loses moisture. The dry shrinkage rate of the wood from the fiber saturation point to the furnace dryness is about 0.1% in the direction of the grain, about 3 to 6% in the radial direction, and about 6 to 12% in the chord direction. The difference in radial chord-to-dry shrinkage is the main cause of cracks and warpage in wood. Globe Valves ,Globe Valve ,Globe Valve Types,Y Pattern Globe Valve WENZHOU DIYE VALVE&FITTINGS CO.,LTD , https://www.diye-valve.com