ASME SA213 TP321 / TP321H / 1.4541 不锈钢无缝管 热交换器 / 锅炉

ASME SA213 TP321 / TP321H/1.4541， Stainless Steel Seamless Tube， Heat Exchanger / Boiler Application

has more than 33 years experience for heat exchanger tube / boiler tube/ cooling tube，

钛的加入还能 ASTM A213 Tp 321 pipes with high corrosion resistance properties. The intergranular corrosion risk present in most high carbon steels is reduced in the 321 Stainless Steel Tube due to the addition of titanium. The 321 Stainless Steel Exhaust Tubing can last longer in high temperatures. Therefore the 321 Stainless Steel Seamless Tube is used in heat exchangers and in super heaters. There are different types of these pipes such as the 321 Stainless Steel Flexible Tube which is easy to install and to maintain. The application of the Type 321 Stainless Steel Tube can also be seen in boilers and in condensers. We produce high quality 321 SS Tube in different sizes and types. Our SS 321 Seamless Tube is suitable for smaller size piping with high accuracy. This corrosion resistant steel could also be identified as the 321 Cres Tube. Our customers can get custom finishes of these pipes as well. Please contact us with any of your inquiries on product details or pricing.

TP321 is a stabilized stainless steel which offers as its main advantage an excellent resistance to intergranularcorrosion following exposure to temperature in the chromium carbide precipitation range from 800 °F to 1500°F (427°C to 816°C). Alloy 321 stainless steel tubing is stabilized against chromium carbide formation by the addition of titanium.TP321 TP321H Stainless Steel is a titanium-stabilised version of TP304， used in particular applications within the sensitizing temperature range. Its resistance to sensitization， coupled with its higher strength at high temperature makes it suitable in applications where 304 will become sensitized， or where TP304L has insufficient hot strength. It is not subject to weld decay intergranular corrosion when exposed to mildly corrosive environments. However， 焊接 321 must never be used in highly oxidising environments as it is liable to ‘Knife-line’ attack. However， 321 is a much better option in operating temperature environments in excess of 500° C and therefore has its own merits. Alloy 321 stainless steel tube is also advantageous for high temperature service because of its good mechanical properties. Alloy 321 stainless steel offers higher creep and stress rupture properties than Alloy 304 and， particularly， Alloy 304L also be considered for exposure where sensitization andintergranular corrosionare concern.TP321 TP321H stainless steel is basically from 304 stainless steel. They different by a very very small addition of Titanium. The real difference is their carbon content. The higher the carbon content the greater the yield strength. 321 stainless steel has advantages in a high temperature environment due to its excellent mechanical properties. Compared with 304 alloy， 321 stainless steel has better ductility and resistance to stress fracture. In addition， 304L can also be used for anti-sensitization and intergranular corrosion.Grade TP304L is more readily available in most product forms， and so is generally used in preference to 321 if the requirement is simply for resistance to intergranular corrosion after welding. However 304L has lower hot strength than 321 and so is not the best choice if the requirement is resistance to an operating environment over about 500°C.

Solution Treatment (Annealing) – heat to 950-1120°C and cool rapidly for maximum corrosion resistance.
Stabilising – heat to 870-900°C for 1 hour per 25mm of thickness and air cool. Stabilisation is recommended for most severe service conditions (above 425°C) and particularly for material annealed at the upper side of the annealing temperature range.
Stress Relief – Heat to 700°C for 1 to 2 hours and air cool.  These grades cannot be hardened by thermal treatment.

我们的主要产品 不锈钢管/双相钢管/镍合金管:

1>.A:不锈钢 钢级： TP304/304L/304H， TP310S/310H， TP316/316L/316Ti/316H， TP317L/317LN， TP321/321H， TP347/347H， NO8904(904L)， NO8904(904L)， NO8904(904L)。

B:PH 不锈钢 Steel:17-4PH(1.4542)， 17-7PH(1.4568)，15-7PH(1.4532)

C:双工 钢种： S31803(2205)， S32750(2507)， S32760， S32304， S32101， S31254(254Mo)， 235Ma， UNS NO8926， NO8367。

D:镍合金 钢级：Hestalloy：C-276， C-4， C-22， C-2000， X， B-2， B-3， G-30， G-35。 蒙乃尔合金400，401， 404， R-405， K500。

铬镍铁合金600， 601， 617， 625， 690， 718， 740， X-750. Incoloy800， 800h， 800ht， 825， 840。

纯镍镍-200，镍-201，镍-270。 NS 合金：Ns 1101，NS1102，NS1103，NS3105。

2>.标准ASTM A213， A249， A269， A312， A789， A790， B163， B167， B444， B677，...and ASME， DIN， EN， JIS， BS， GOST，...

3>.外径尺寸范围：0.5mm~650mm。壁厚：0.05mm~60mm。最大长度小于 26 米/PC。
4>.无缝和焊接，固溶酸洗/光亮退火/抛光。

优势产品： (锅炉、热交换器和冷凝管）：

ASTM A213（TP304，TP304L，TP304H，TP310S，TP316L，TP316Ti，TP317/L，TP321/H，TP347/H）

ASTM A249（TP304，TP304L，TP316L，TP321/H）
ASTM A789（S31803(2205)，32750(2507)，S31254(254MO)，S32304）

ASTM B163/B167/B444，用于镍合金钢管

美国标准 B677 uns no8904(904l)

美国标准 B111（70400， C70600， C71500， C71640， C68700， C44300）

其他标准：EN10216-5， DIN 17456， DIN 17458， GOST9941-81， JIS-G3459， JIS-G3463

规格

ASME SA213/A213:无缝铁素体和奥氏体合金--标准规范

钢制锅炉、过热器和不锈钢换热管。

标准 A249 / A249M:Standard Specification for Welded Austenitic Steel Boiler， SuperheaterHeat-Exchanger， and Condenser Tubes.

其他标准：DIN 17456 ， DIN 17458， EN10216-5， GOST 9940-81， GOST 9941-81， JIS-G3463，...

材料等级：

尺寸 范围:

最后加工

退火腌制/光亮退火。

管子类型：

U 形弯管和直管