ASME SA249 Welded SS TP316L Bend U Boiler Tubes

YuHong can offer ASME SA249 TP316L welded austenitic steel bend U tubes and we sell these products with highest quality in more than 70 countries.

ASME SA249 / ASTM A249 This specification covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from the austenitic steels, with various grades intended for such use as boiler, superheater, heat exchanger, or condenser tubes.

TP316L stainless steel pipe is a high-strength, corrosion-resistant, high-temperature-resistant material, which is widely used in petroleum, chemical, pharmaceutical, food and other fields. The tensile strength, flexural strength and elastic modulus of TP316L stainless steel pipe are much higher than traditional materials. Especially in high temperature and low temperature environments, the change characteristics of its mechanical properties are more obvious.

U tubes are manufactured by bending straight tubes. And bending is done cold on an automatic U-bend. To ensure tube wall thinning and diameter ovality are controlled, tube bending is accomplished with a mandrel inserted into the tube. And the U-bend of the U-tube is stress relieved under controlled conditions and cycles for extended life.

Specifications

Test Required Bend U tube

1.Corrosion Test

2.Chemical Analysis

3.Average Grain Size

4.Ultrasonic Examination

5.Mechanical Tests: Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test

6.Reverse-bend and Re. flat tests

7.Eddy Current Testing

8.Hydrostatic Testing

9.Air Under Pressure Test

10.Visual Inspection

Chemical Composition S31603 TP316L

Note:For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040% is necessary in Grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.500 in. [12.7 mm] in outside diameter and light wall are those less than 0.049 in. [1.2 mm] in minimum wall thickness.

Mechanical Property S31603

Note:Mechanical property requirements do not apply to tubing smaller than 1 ⁄ 8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness.

Applications Industry

Pharmaceutical Equipment

Chemical Equipment

Power Generation

Sea Water Equipment

Petrochemicals

Heat Exchangers / Condensers / Boiler

Gas Processing

Specialty Chemicals

Pulp and Paper Industry