U TUBE GRADES

304  304H  321  321H   316L

S31803  S32205  317L  904L

U TUBE CHEMICAL

Normal Chemical Composition

to ASTM A213  ASTM A789

U TUBE SIZES
OD.12.7- 38.1mm
WT. 0.89-5.49mm
R. 1.5*OD-1500mm (Minimum bending radius for OD over 28 mm after agreement.)
Leg length min. 1,000 mm.
Leg length max. 16,500 mm.
Straight tube length max. 35,000mm.
Heat treatment for radius up to 1500 mm

Walmi Stainless Steel U Tubes,Boiler, Super heater and Heat Exchanger tube compliance to standards below:

ASTM A213

EN10216-5

JIS G3463

DIN 17458

GB/T 13296

MTC: EN10204:2004  3.1

DELIVERY CONDITION

Solution heat treat & quench
Stress relieved after U – Bending
(bending area plus 300mm for each leg)

PRODUCTION PROCESS

Round Bar > Pipe blank > Cold Drawing
> NDT Testing > Mechanical Testing >
U-Bending > Hydrostatic Testing > Final Inspection

TOLERANCE

Outside Diameter, Wall Thickness, Length  of

ASTM A213 U tube according to ASTM A1016

Outside Diameter, Wall Thickness, Length  of

EN10216-5 pipe according to EN ISO 1127

MECHANICAL PROPERTIES

Intergranular corrosion test according

to ASTM A262 Pratic E.

Walmi stainless steel U tubes are all of the highest standard and will exceed all standard requirements without a shadow of a doubt.

Disclaimer
All data provided is for information and guidance only. Information above is not for design purposes and comes without warranty or guarantee with respect to the subject matter or fitness for purpose.

Walmi Stainless Steel U Tubes,Boiler, Super heater and Heat Exchanger Tube are austenitic stainless tubes, including grades containing the letter H, which can provide higher creep-rupture strength.  The stainless heat exchanger tubes are always used at high temperature service, such as the cooling, heating, or re-heating of fluids, gases or air in a wide range of industries below:

♦ Heat exchangers

♦ Syngas coolers

♦ Power plant

♦ Power boilers

♦ Waste heat boilers

♦ Nuclear power generation

♦ Chemical processing

♦ Hydro carbon processing

♦ Oil refining

♦ Aerospace

Walmi stainless steel heat exchanger tubes can also be delivered as U-bent tubes. Learn more.

Stainless Steel Hollow Bar is primarily used for the manufacture of radially machined components, a great variety of hollow products and cylindrical components, which will be used in conditions where where corrosion is an issue .The use of Hollow Bar is an economic and efficient means of supplying high quality raw material and a sensible alternative to the use of solid bar as it reduces machining requirements and minimizes material wastage.

Advantages

Specifications:

• Excellent availability, Reduced customer inventories.
• No minimum order, 1 piece stainless steel hollow bar order is accepted by Walmi Stainless Steel.
• Improved cutting speeds and feed rates, better machine utilization and reduced fixed cost per produced stainless steel component.
• Reduced tool wear, lower lubricant usage and machinery maintenance costs, better machine utilization through reduced stoppage time.
• Less machine setting-up time and and machine cycle times, lower labor and overhead costs for each stainless component.
• Faster machining, shorter production time due to excellent and consistent machining properties of stainless steel.
• Easier handling due to lower weight per un-machined component of the hollow bar.
• Very competitive from short to long series production of hollow bar compared to forging.
• shorter production time for hollow bar compared to bore out solid stainless steel bar.
• tangled chips can be avoided Due to limited internal machining