High quality/High cost performance Seamless Stainless Steel Heat Exchanger Boiler U Tubes

Min.Order: 1,000
Product origin: Ningbo, Zhejiang, China
Infringement complaint: complaintComplaint
US$ 4.6 ~ 5.4

Description

U Shape Steel Bending Tube Stainless Steel Tube/Pipe Bending U Tube

 

Product description

Standard

ASTM A554,ASTM A312

Material Grade

201,202,304,316,316L,430,409L,430,410,420J1,420J2

 

Main Material

 

a) 201 (Ni0.8%-1%)  

b) 202 (Ni: 3.0%-4.0%)
c) 304 (Ni: 8%  Cr: 18%)

d) 316 (Ni: 10%  Cr: 18%)

Size Range

OD:6.35mm- 273mm

Thickness

0.5-30mm

Length

6m or as customers' request

 

Tolerance

a) Outer Diameter:  +/- 0.2mm

b) Thickness: +/- 0.02mm

c) Length: +/- 5mm

Surface

180G, 320G Satin/Hairline

400G, 600G  Mirror finish

Application

handrail,railing, staircase, weldmesh screen,door,window, balcony,fence,bench,furniture,Heat exchanger Feedwater Heater,etc

Test

Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT

 

Tensile Strength

≥535

≥520

≥520

≥520

Yield Strength

≥245

≥205

≥205

≥205

Extension

≥30%

≥30%

≥35%

≥35%

Hardness (HV)

<105

<100

<90

<90

Features :

  • 'U' bending is done by cold working process.
  • 'U' bending is done to the required radius as per customer drawings.
  • The bend portion and six inch leg is stress relieved by resistance heating.
  • Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.
  • The radius is checked for its OD and wall thinning with the recommended specification.
  • The physical properties and micro-structure is checked at three different position.
  • Visual inspection for waviness and cracks is done with Dye Penetrant Test.
  • Each tube is then hydro tested at the recommended pressure to check for leakage.
  • Cotton ball test is done to check the ID cleanliness of the tube.
  • Thereafter pickled, dried, marked and packed.
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