ASTM A556 Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes.

ASTM A556無縫冷拔碳鋼給水加熱器管標(biāo)準(zhǔn)規(guī)范。

ASTM A556 specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes for use in tubular feedwater heaters. Mechanical tests shall be made on specimens including: tension test; flattening test; flaring test; hardness test; and hydrostatic test. Each tube shall be tested after the finish heat treatment following the final cold-drawn pass by passing through a nondestructive tester capable of detecting defects on the entire cross section of the tube.

ASTM A556規(guī)范涵蓋了用于管式給水加熱器的最小壁厚無縫冷拔碳鋼管，包括彎曲成U形管。應(yīng)對試樣進(jìn)行機(jī)械試驗(yàn)，包括：拉伸試驗(yàn)；壓扁試驗(yàn)；燃燒試驗(yàn)；硬度試驗(yàn)；水壓試驗(yàn)。每根管子在最終冷拔道次后的精加工熱處理后，應(yīng)通過能夠檢測管子整個橫截面缺陷的無損檢測儀進(jìn)行測試。

Scope范圍

1. 1. This specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the from of u-tubes, if specified, for use in tubular feedwater heaters.

1.1本規(guī)范涵蓋了用于管式給水加熱器的最小壁厚無縫冷拔碳鋼管，包括彎曲成u形管的形式（如有規(guī)定）。

1. 2. The tubing sizes covered shall be 5/8 to 1 2/4-in. [15.9 to 31.8-mm] outside diameter, inclusive, with minimum wall thicknesses equal to or greater than 0.045 in. [1.1 mm].

1.2所涵蓋的管道尺寸應(yīng)為外徑5/8至1 2/4英寸[15.9至31.8毫米]，包括在內(nèi)，最小壁厚等于或大于0.045英寸[1.1毫米]。

1. 3. optional supplementary requirements are provided, and hen desired, shall be stated in the order.

1.3提供了可選的補(bǔ)充要求，如有需要，應(yīng)在訂單中說明。

1. 4. The values stared in either inch-pound units or SI units are to be regarded separately as the standard. within the text, the SI units are shown in brackets. The values sated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

1.4以英寸-磅單位或國際單位表示的值應(yīng)單獨(dú)視為標(biāo)準(zhǔn)。在文本中，國際單位制顯示在括號中。每個系統(tǒng)中記錄的值不是完全等效的；因此，每個系統(tǒng)都必須獨(dú)立使用。結(jié)合兩個系統(tǒng)的值可能會導(dǎo)致不符合規(guī)范。除非訂單中指定了本規(guī)范的“M”名稱，否則應(yīng)采用英寸-磅單位。

Chemical Components (%) of ASTM A556  ASTM A556的化學(xué)成分（%）

All Mechanical Properties Tensile Requirements and Hardness of ASTM A556  ASTM A556的所有機(jī)械性能、拉伸要求和硬度

Tolerances:公差：

Tolerances according to specification or according to agreement. Standard tolerances are:

公差符合規(guī)范或協(xié)議。標(biāo)準(zhǔn)公差為：