The demand of the downstream industry is slowing down, and the competition in the large-diameter seamless steel pipe market will become more intense. However, the problems of tight capital, difficult financing, and expensive financing will be difficult to alleviate, and the risks of exchange rate and debt may increase.

The current market price has been at a low price for the same period in the past 10 years, and the market has a smaller breakthrough space.

There are relatively few orders for greenhouse traders. Although there are not many stocks in steel mills, the willingness to lower them is also obvious, thus promoting volume. In East China, the inventory in this week has increased slightly.

Steel mills: Puyang, Wenfeng and other second-tier steel mills, the plate price of 16-25mm plate is temporarily stable, although there is still room for discounted price orders, hot-dip galvanized greenhouse pipe merchants still have no order enthusiasm.

Due to the weak demand of the agents for the later period, the enthusiasm for ordering is lower. Although the market has a variety of out-of-stocks, the steel traders are very cautious in receiving the goods. This phenomenon once again shows that the merchants believe that the current steel market lacks price-driven power and is low.

It is expected that the mainstream trend today will still show a downward adjustment in the construction of the plate. Although the iron ore price is currently running weakly, the attention of the public is still very high, and how it will be interpreted in the future.

At present, there are fewer cold-rolled resources on the market. Although there are a small amount of resources to supplement the market one after another, overall, the resources available for circulation in the market are still limited.

Stainless steel Seamless pipe production companies are aware that the so-called stainless steel seamless pipe and carbon steel seamless pipe differences, mainly refers to the difference between the stainless steel and carbon steel planning rules, that is to say, the two kinds of steel planning rules can not be universal. The differences are as follows:

Carbon steel seamless pipe is a kind of steel strip. The pipe has a hollow section, a large number of pipelines used for conveying fluids, such as oil, gas, gas, water and some solid materials, such as pipelines.

(1) The importance of the structure of heavy industrial structures, large-span structures, high-rise or super-high-rise civil construction structures or structures and other important structures, should consider the selection of good quality seamless steel tubes, the general industrial and civil architecture, according to the nature of the work can be selected by the ordinary quality of seamless steel tubes.

The standard provisions in piping, mechanical properties, physical properties, the use of performance and process performance indicators, corresponding to the different steel grades. Performance metrics vary greatly. Mechanical properties: Tensile strength, yield intensity, elongation, hardness, impact energy; physical properties mainly refer to the grain size.

Hot dip galvanized square tube is used square tube plate or strip after curl forming in the hot dip galvanized pool through a series of chemical reactions forming the square tube; can also be hot-rolled or cold rolled galvanized steel strip after colda hollow square cross-section bend, then the high-frequency welded steel pipe.

　　This problem about flat welding flanges has always been a topic of concern. It is related to the production costs or economic benefits of companies and enterprises. Therefore, the sealing principle of flat welding flanges is constantly improving and perfecting.

　　The manufacturing process of the high-pressure elbow firstly welds a polygonal ring shell with a polygonal cross section or a multi-edge fan shell closed at both ends. After the internal pressure is filled with the pressure medium, the internal pressure is applied, and the cross section changes gradually from the polygon under the action of the internal pressure.

Because the elbow has good comprehensive performance, it is widely used in chemical engineering, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other basic projects.

WCB (carbon steel), LCB (low temperature carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% chromium 0.5% molybdenum steel), WC9 (2.25% chromium), C5 (5% chromium 0.5% molybdenum), C12 (9% chromium 1% molybdenum), CA6NM (4 (12% chromium steel), CA15 (4) (12% chromium), CF8M (316 stainless steel), CF8C (347 stainless steel), CF8 (304 stainless steel), CF3 (304L Stainless steel), CF3M (316L stainless steel), CN7M (alloy steel), M35-1 (Monel), N7M (Hast nickel alloy B), CW6M (Hasta nickel alloy C), CY40 (Inconel nickel alloy) etc.

There are many types of pipe fittings, which are classified according to their use, connection, materials, and processing methods.

The water supply of the room is important to adopt steel and conical steel pipes to cause “secondary pollution” in pipeline transportation. In daily life, the quality of drinking water and the safety of water pipes are the core of people's lives. Double-sided submerged arc welding straight seam steel pipe

1. Apparent requirements for straight seam steel pipe welds Before the non-destructive testing of straight seam steel pipes, the inspection of the weld appearance should meet the requirements. The general requirements for the appearance of straight seam steel pipe welds and the surface quality of welded joints are as follows: the appearance of the weld should be well formed, and the width should be 2 mm per side over the edge of the groove. The height of the fillet of the fillet weld shall comply with the design regulations and the shape shall be smooth transition.

Acceptance 1.1 The quality inspection and acceptance of straight seam steel pipes shall be carried out by the technical quality supervision department of the supplier.

The high-frequency resistance welded steel pipe is different from the ordinary welded pipe welding process. The weld is made of the base material of the steel strip body, and the mechanical strength is better than that of the general welded pipe.