U Bend Stainless Steel Heat Exchanger Tube , Oil Metric Stainless Steel Tubing
Brand Name:zheheng
Certification:ISO9001 PED
Model Number:25mm
Minimum Order Quantity:Negotiable
Delivery Time:30 DAYS
Payment Terms:L/C, T/T, D/A, D/P
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Location:
Wenzhou Zhejiang China
Address:
No999 .wenzhou airport wenzhou city,zhejiang china
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within 25 hours
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Product Details
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.
| Standard | ASTM A554, A249, A269 and A270, A312 | |||||
| Material Grade | 201 ( Ni 0.8%), 202 (Ni 3.5%~4.5%), 301(Ni 5%) 304 (Ni 8%, Cr 18%), 316 (Ni 10%, Cr 18%), 316L (Ni10%~14%), | |||||
| Outer Diameter | 0.5mm--508mm | |||||
| Thickness | 0.25mm - 60mm | |||||
| Length | 6m or as customers' request | |||||
Tolerance | a) Outer Diameter: +/- 0.2mm | |||||
| b) Thickness: +/- 0.02mm | ||||||
| c) Length: +/- 5mm | ||||||
| Surface | 180G, 320G, 400G Satin / Hairline 400G, 500G, 600G or 800G Mirror finish | |||||
| Application | Decoration construction, upholstery, industry instrument | |||||
| Test | Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT | |||||
| Chemical Composition of Material | Material Composition | 201 | 202 | 304 | 316 | 430 |
| C | ≤0.15 | ≤0.15 | ≤0.08 | ≤0.08 | ≤0.12 | |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | |
| Mn | 5.5-7.5 | 7.5-10 | ≤2.00 | ≤2.00 | ≤1.00 | |
| P | ≤0.06 | ≤0.06 | ≤0.045 | ≤0.045 | ≤0.040 | |
| S | ≤0.03 | ≤0.03 | ≤0.030 | ≤0.030 | ≤0.030 | |
| Cr | 16-18 | 17-19 | 18-20 | 16-18 | 16-18 | |
| N | 3.5-5.5 | 4-6 | 8-10.5 | 10-14 | ||
| Mo | 2.0-3.0 | |||||
Mechanical Property | Material Item | 201 | 202 | 304 | 316 | |
| Tensile Strength | ≥535 | ≥520 | ≥520 | ≥520 | ||
| Yield Strength | ≥245 | ≥205 | ≥205 | ≥205 | ||
| Extension | ≥30% | ≥30% | ≥35% | ≥35% | ||
| Hardness (HV) | <253 | <253 | <200 | <200 | ||
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U Bend Stainless Steel Heat Exchanger Tube , Oil Metric Stainless Steel Tubing
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