Table H.1 lists material classes for the purchaser to select (see 6.12.1.3).
表 H.1 列出了供买方选择的材料等级(见 6.12.1.3)。
Table H.2, Table H.3, and Table H.4 may be used for guidance regarding materials specifications. If these tables are used, it should not be assumed that the material specifications are acceptable without taking full account of the service in which they will be applied. Table H.2 lists corresponding materials that may be considered acceptable. These materials represent family/type and grade only. The final required condition or hardness level (where appropriate) is not specified. These materials might not be interchangeable for all applications.
表 H.2、表 H.3 和表 H.4 可用于指导选择材料规格。如果使用这些表格,在未充分考虑材料的使用情况时,不应假定材料规格是可以接受的。表 H.2 列出了可接受的相应材料。这些材料仅代表系列/类型和等级。最终要求的条件或硬度等级(如适用)未作规定。这些材料可能无法在所有应用中互换。
==Table H.1-Material Classes for Pump Parts
表H.1—泵部件的材料等级==
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==Table H.2 Material Specifications for Pump Parts
表H.2—泵部件的材料标准==
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a. UNS (unified numbering system) designation for chemistry only.
UNS(统一编号系统)代号仅用于化学
b. Where EN standards do not yet exist, European national standards are available, e.g. AFNOR, BS, DIN, etc
如果没有 EN 标准,可采用欧洲国家标准,如 AFNOR、BS、DIN 等。
c. Do not use for shafts in the hardened condition (over 302 HB)
请勿用于硬化状态下的轴(超过 302 HB)。
d. Special, normally use 4140 alloy steel..
特殊,通常使用 4140 合金钢。
e. For shafts, standard grades of austenitic stainless steel may be substituted in place of low-carbon (L) grades.
对于轴,可以用标准牌号的奥氏体不锈钢代替低碳 (L) 牌号的不锈钢。
f. Super duplex stainless steel classified with pitting resistance equivalent (PRE) number greater than or equal to 40:
抗点蚀当量(PRE)大于或等于 40 的超级双相不锈钢:
PRE = Wcr+3.3WMo+16WN,where w is the percentage mass fraction of the element indicated by the subscript.
PRE=Wcr+3.3WMo+16WN,其中 w 是下标所示元素的质量百分比。
g. For temperatures 500 °F (260 °C), 316L stainless steel or UN N06625 piping and fittings may be used. For temperatures > 500 °F (260 °C), only UN N06625 piping and fittings shall be used. See 6.4.2.6.
温度为 260°C (500°F) 时,可使用 316L 不锈钢或 UN N06625 管道和接头。温度 > 260 °C (500 °F)时,只能使用 UN N06625 管道和接头。参见 6.4.2.6。
h. Many applications that have moderate corrosion properties do not require the 316/316L and the option of 304/304L is suitable. The option to use 304/304L in for those moderate corrosion applications that do not require the greater corrosion resistance of 316/316L is advised by the vendor.
许多具有中等腐蚀性能的应用不需要 316/316L,可以选择 304/304L。对于不需要 316/316L 更强耐腐蚀性的中等腐蚀应用,卖方建议使用 304/304L。
==Table H.3 Nonmetallic Wear Part Materials
表H.3—非金属易损件材料==
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==Table H.4 Piping Materials
表H.4—管道材料==
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