The hot-rolled coil price increases, the overall market, the 24 hot-rolled 4.75 mm average price 2896 yuan/ton, market prices rose 60 yuan/ton from last week. Shanghai, guangzhou, wuhan, beijing-tianjin-hebei, shenyang, chengdu, xi 'an area of 22 prices for 10-160 yuan/ton; Jinan market prices fell only 30 yuan/ton.

Plate market in the overall price rise, the national 24 major market middle 20 mm, the average price is 2745 yuan/ton, up from last week 64 yuan/ton. Shanghai, hangzhou, changsha, beijing-tianjin-hebei, shenyang, lanzhou prices in 20 areas such as 30-170 yuan/ton.

Straight seam steel pipe is a high frequency straight seam, submerged arc straight seam, welding seam straight, straight seam pipe line, production process, such as the floorboard of the product. High frequency straight seam steel pipe with high frequency current skin effect makes the steel plate at both ends in a short period of time produce high temperature and extrusion force to melt together, is really no electrode parent metal docking. ERW high frequency straight seam steel pipe by using hot rolled plate as raw material, wall thickness can be controlled around + / - 0.2 mm, tube ends by American standard or standard, GB/T9711.1 APl repair end groove, specified length of delivery, etc. In recent years, the natural gas pipe network engineering and gas companies has been widely used in ERW steel tube as the main pole of city pipe network. Proportion in the world steel pipe using high frequency straight seam steel pipe ERW accounted for 60%.

Straight seam steel pipe in hebei often refers to JCOE production of double-sided submerged arc straight seam steel pipe, is made of JCOE cold forming process, weld wire use, and use particle flux submerged arc at the same time, its name is submerged arc straight seam steel pipe. Submerged arc welding and straight seam steel pipe mainly flexible production technology, can produce 325 mm - 1420 mm in the middle of the arbitrary specifications and wall thickness. Great satisfaction from around the world to the steel pipe size standards used, and in the production of high frequency straight seam steel pipe is usually within the common specifications. High frequency straight seam steel pipe in hebei is usually called the original tube, industry to distinguish it from submerged arc welding and straight seam steel pipe, or the name of the thermal expansion of the high frequency straight seam steel pipe mixed food.

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