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Classification of high-pressure alloy pipes
Mainly used as boiler water walls, superheaters, reheaters, economizers, headers and steam ducts, as well as heat exchanger tubes for petrochemical and nuclear energy. Materials are required to have high creep limit, lasting strength and lasting plasticity, good oxidation resistance and corrosion resistance, sufficient structural stability and good weldability and hot and cold processing properties. Designed to have a service life of 10,000 years. The main brands in China are:,,,, high pressure alloy pipe,, which are used in the range of ~℃. The heat treatment generally adopts normalizing and tempering treatments.
Low-alloy heat-resistant steel plates are widely used in petrochemical industry, coal gasification, nuclear power and power stations to make pressure vessels. The main brands in China include high-pressure alloy pipes (.), (.1), etc., which are mostly used in hot wall hydrogenation reactors. 1) Made of steel plate (~). Since the equipment works under high temperature, high pressure and hydrogen resistance conditions for a long time, and at the same time, the problem of preventing ℃ embrittlement is considered, the material is required to have high purity, sulfur and phosphorus are not required. And the lowest possible harmful elements such as tin, antimony, arsenic, etc. require electric furnace smelting and refining outside the furnace.
Steel for fasteners is a key material for connecting in steam turbines, boilers and other high-pressure vessel equipment. It requires sufficient yield limit, high relaxation stability, good lasting plasticity and small Long-lasting notch sensitivity, corresponding oxidation resistance and good cutting performance. The main brands in China include,,,,bB, etc., which can be used in the range of ~℃. These grades are generally used after conditioning.
The main shaft, impeller and forged rotor are one of the key components of the steam turbine. The materials are required to have good comprehensive mechanical properties, fracture toughness, high creep resistance and lasting strength, and good thermal fatigue resistance. ． Commonly used brands of spindles and impellers in China include, 3, etc. The gas turbine rotor is made of solid forged steel. Use quenching and tempering treatment. For large forgings such as solid forged rotors and impellers, in order to fully dissolve the vanadium carbide and improve the plasticity and toughness, a normalizing pretreatment can be performed before quenching, or a heat treatment process of two normalizing and tempering can be used.
These two grades contain the highest alloying elements among pearlitic heat-resistant steels. They have good heat resistance and corrosion resistance in petroleum media and are widely used in the manufacture of pipelines for petroleum distillation equipment. and containers, heating furnace tubes and heat exchangers, etc. It is also used as parts such as hot stamping dies, fuel pumps, valves, and boiler hangers. Usually the operating temperature is below ℃. Since this steel is air-hardened steel, the weld has high hardness and poor plasticity. It should be slowly cooled and annealed after welding.
Our company's main business:
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Steel pipes, round steel,
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, steel pipe, seamless steel pipe, high-pressure boiler pipe
, alloy pipe
, stainless steel pipe
. The company has strong strength, sufficient resources, abides by contracts and keeps promises, strives for credibility with quality and development with reputation, and wins customers with low prices. It can handle ordering business for steel pipes of various specifications and materials from major steel pipe factories for the majority of users.
Liaocheng Baoxin Steel Pipe Co., Ltd.
is a professional steel trading company integrating trade and distribution. It consists of steel pipe sales department, profile sales department and plate sales department. Tens of thousands of tons of goods are in stock for a long time! The company has established long-term and stable cooperative relationships with dozens of large steel manufacturers, with sufficient supply and complete varieties and specifications.
Steel Pipe Sales Department: Mainly engaged in the production of Baotou Steel, Panzhihua Iron and Steel, Anshan Iron and Steel, Shanghai Baosteel, Tianjin Seamless, Hengyang Valin and other major steel mills,,,,,(),3,3,,,
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Seamless pipes, high-pressure boiler pipes, seamless square and rectangular pipes, alloy pipes, high-temperature and high-pressure boiler pipes, petroleum pipes, etc. of various materials and specifications Cracked pipes, hydraulic support pipes, low alloy pipes, imported high alloy pipes, etc. At the same time, the company will also produce special steel pipes with special specifications and materials for you according to your requirements.
Plate Sales Department: Mainly engaged in steel plates produced by large steel plants such as Jinan Iron and Steel, Laiwu Iron and Steel, Baotou Steel, Tiangang, Shigang, Tangshan Iron and Steel, Anyang Iron and Steel, Rizhan Iron and Steel, Maanshan Iron and Steel, Handan Iron and Steel, Wugang and other large steel plants. , steel plates, steel plates,,, various specifications of steel plates.
Profile Sales Department: Mainly engaged in profile steel, section steel, section steel, square steel, channel steel, angle steel, light and heavy rail, etc. produced by several major steel plants such as Maanshan Iron and Steel, Laiwu Iron and Steel, Rizhao, Jinxi, and Panzhihua Iron and Steel.
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