• A manufacturer for special materials pipes, tubes,fittings,materials including nickel-based alloy, austenitic, ferritic, duplex stainless steel
  • stainless steel seamless pipe,duplex stainless steel seamless tubes, nickel alloy, nickel base alloy seamless tube and pipe,butt-welding fitting, elbow, tee, cross, flange,valve.
  • Zhongzhou Special Alloy Tube Co.,ltd is glable special alloy and stainless steel products company, which is international piping system material manufacturer and upplier, office located in Shanghai. In glable business, we have sucess to entrying North America, Europea, East Asia, Austrialia,Africa market.Our focus on natural gas transportation,offshore unit,chemical refining,nuclear power,shipbuilding,steel structure,machining and so on piping system engineering. We have strong resources integration, production and processing base are located in Shanghai and Jiangshu province, The factories in Shanghai and Jiangsu,which have vacuum smelting, non-vacuum smelting, horizontal continuous casting, forging, heat treatment and production lines advanced in the industry, and has international advanced technology and complete inspection means. Produces focus on : nickel base alloy,cobalt base alloy,iron base alloy,austenitic stainless steel,super austenitic stainless steel,duplex and super duplex stainless steel,high alloy material products; type are bars,pipes,tubes,fittings,flanges,which are widely used in metallurgy,cars,thermal power, nuclear power, petro-chemical, aviation and aerospace, rail transportation , paper industry,water industry and so on. Material and size as follows: Nickel based Alloy : ASTM SB163, SB165, SB444, SB622, SB407, SB535, SB677, SB668, SB729,Inconel 600,601,625,670,690,718,X-750;Inconel 800,800H/HT,825,840,901,926,330,20;Hastelloy C-276 Super stainless steel: 904L,254MO Duplex/Super Duplex UNS S31803,S32205,S32750,S32760, ASTM A/SA312, A/SA213, A/SA269, EN10216-5 Austenitic Pipe & Tube Standard:GOST9941-81, GOST5632-72 .ASTM/ASME A312/SA312, A269/SA269, ASTM A511, EN10216-5,DIN17458-85,DIN17456-85,JIS G3459,JISG3463,JISG3448,JISG3446,304,304L,316,316L,316Ti,310S,309S,321,321Ti,347 Oil and Gas Cement and Minerals Fertilizers and Petrochemicals Metallurgy and cars industry Mechanical industry Wastewater Treatment and other water industry paper industry, aviation and aerospace Transmission and rail transportation thermal power and other power Generation nuclear power Environmental and Safety our strong supporting layer and our sales’ professional skills will help customers to supply efficient and timely packaged supporting serivces. We have some stock bars ,pipes, fittings .Our quality is always satisfied by our clients, we are strictly controling the whole production and testing. We will always adhere to the policy of
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    Overall corrosion of nickel and its corrosion resistant alloys in high temperature HCI gas

    The characteristics of HCI are similar to those of dry CI. There is also a critical temperature that causes the corrosion rate of metal materials to increase sharply. For some corrosion test data, see Table 2-27, Table 2-28, and Table 2-29. Combining these corrosion data, it can be considered that pure nickel and NiAl4 containing 4% Al have the best corrosion resistance in high-temperature HCI gas. In this high-temperature gas, Monel 400 and stainless steel do not have suitable corrosion resistance. During the chemical process using high-temperature HCI gas, avoid HCI condensation in the equipment or process piping. Failure to do so will result in severe corrosion of the equipment and piping materials by the HCI acid formed by condensation of HCI gas.

    2-27 Corrosion of Some Metallic Materials in Dry HCI

     

    Grade Short-term experiments in dry HCI with corrosion rates exceeding the approximate temperatures for a given corrosion rate Temperatue /ºC
    0.76mm/a 1.52mm/a 3.05mm/a
    Ni201 454 510 565 510
    600 426 482 538 482
    C-276 371 426 482 452
    316 stainless steel 371 371 482 426
    304 stainless steel 343 399 454 399
    Carbon 260 315 399 260
    Monel 400 232 260 343 232
    Cu 93 149 204 93

    2-28 Corrosion of Some Nickel Base Alloys and Stainless Steels in Anhydrous HCI

    Grade Temperature/ºC time/h corrosion average rate/ mm﹒a⁻¹
    Ni201 498 50 0.08
    600 498 500 0.08
    304 stainless steel 498 500 0.26

    2-29 Corrosion Test Results of Nickel-based Corrosion Resistant Alloys in High-temperature HCI Gas 96

    Grade 400ºC 450ºC
    corrosion average rate/ g﹒(m²﹒h)⁻¹ Intergranular corrosion corrosion average rate/ g﹒(m²﹒h)⁻¹ Intergranular corrosion
    Ni200 0.097~0.152 none 0.109~0.249 have
    high purity Ni 0.075 none 0.129~0.343 have
    monel 400 0.37 / 1.372 none
    NiAl₄+Ce 0.063 none 0.111 none
    NiAl₄ 0.108 none 0.164 none
    NS 3301 0.222 / / /
    NS 1401 0.216 / / /
    Post time: Apr-27-2018