ASTM A269/ A213 seamless stainless steel U bend heat exchanger tube for oil industry

zheheng steel is one of ASTM A213 stainless steel seamless tube manufacturer, seamless stainless steel u bend heat exchanger tube stockholder, ss cold draw stainless steel tube exporter ,ss cold roll seamless stainless steel heat exchanger tube supplier in china ,

Our heat exchanger tube with pickling and annealing surface is very popular in boilers and heat exchangers industry , water heater industry , air-conditioning industry etc . This kind of seamless tubes are have a very important position in our all products .

Application

a) For fluid & gas transport

b) Structure & machining etc

Advantages

a) Advanced technology of cold draw machine

b) Advanced annealing machine

c) Better mechanical property

d) More precise dimension

e) Perfect inspection method and inspection equipment etc

Repair by Welding
1 For welded pipe whose diameter equals or exceeds NPS 6, and whose nominal wall thickness equals or exceeds 0.200, it is permitted to make weld repairs to the weld seamwith the addition of compatible filler metal using the same procedures specified for plate defects in the section on Repair by Welding of Specification A999/A999M.
2 Weld repairs of the weld seam shall not exceed 20 % of
the seam length.
3 Weld repairs shall be made only with the gas tungsten- arc welding process using the same classification of bare fillerrod qualified to the most currentAWS SpecificationA5.9 as the
grade of stainless steel pipe being repaired and as shown inTable 6. Alternatively, subject to approval by the purchaser,weld repairs shall be made only with the gas tungsten-arc
welding process using a filler metal more highly alloyed than the base metal when needed for corrosion resistance or other properties.
4 Pipes that have had weld seam repairs with filler metal shall be uniquely identified and shall be so stated and identified on the certificate of tests. When filler metal other than that listed in Table 6 is used, the filler metal shall be identified on the certificate of tests.

product show:

Zheheng steel is one  incorporate of manufacturer, Exporter ,consultant ,stockist company specialized in the area of stainless steel tubing , pipe fittings ,Flanges and other stainless steel grade accessories . It is one-stop-shop company ,our team have more than 20 years experience in stainless steel field ,especially in heat exchanger tubing and large diameter pipes with ultra-long, ultra-thin, ultra-thick or ultra-large various and some special-purpose projects .

After years of efforts,we now became more and more stronger , we have consist of four company respectively located in wenzhou(headquarter),lishui,chengdu city,two factorys of ss stainless pipe workshop in lishui ,another one ss pipe fittings workshop located in wenzhou ,one domestic sales company located in chengdu.

On Time, On Budget, For Over 20 Years

Our reputation is for providing competitive prices, technical services and on time deliveries for every project for over 20 years. Our inventory is computerized so our employees can respond quickly to all your requests. If a specific product is not in stock when you request it, we guarantee same day shipping or shortest lead time available.

Our regular feture products are 304/304L,316L, 321,310s,austentic serious ,duplex steel 2205 ,hastelloy c276,inconel 625 ,and super stainless steel 904L , All of our products meet or exceed AISI/ASTM A213 ,A269,A312,EN 10216,GHOST 9941 ,GB,JIS standard. per your specific requirements and include full documentation.

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