| STANDARD: | ASTM A249/ASME SA249/ASTM A688/ASTM A789 | OD: | 1/4′(6.35)， 3/8′(9.52)， 1/2′ (12.7)， 5/8′(15.88)， 3/4′ (19.05)， 1′(25.4) ， 1-1/4′(31.75)， 1-1/2′(38.1)， 2′ (50.8)， 2-1/2′(63.5) ， 3′ (76.2) |
|---|---|---|---|
| WT: | 0.89MM， 1MM， 1.24MM， 1.5MM， 1.65MM， 2MM， 2.11MM， 2.463MM， 2.5MM， 2.77MM | SURFACE: | Bright Annealed (BA)， Polished |
| TYPE: | SEAMLESS/WELDED | LENGTH: | 12ft (3657.6) ， 15ft (4572)， 16ft (4876.8)， 6m ， 20ft (6096) ， 24ft(7315.2 ) ，30ft (9144) |
| High Light: | astm a249 bright annealed tube， asme sa249 tp304 bright annealed tube， tp304l bright annealed stainless steel tube | ||
BRIGHT ANNEALED SA249 TP304 / TP304L STAINLESS STEEL WELDED PIPE
TONG CHUANG GROUP deal with stainless steel pipe and tube already more than 10 years， every year sold more than 80000 tons of stainless steel pipe and tube. Our client already cover more than 50 countries so far.
Standard Specification for Welded Austenitic Steel Boiler， Superheater， Heat-Exchanger and Condenser Tubes oF A249 / SA249
- This specification covers nominal-wall-thickness welded tubes made from the austenitic steels listed in Table 1， with various grades intended for such use as boiler， superheater， heat exchanger， or condenser tubes.
- Grades TP304H， TP309H， TP309HCb， TP310H， TO310HCb， TP316H， TP321H， TP347H， and TP348H are modifications of Grades TP304， TP309S， TP309Cb， TP310S， TP310Cb， TP316， TP321， TP347， and TP348， and are intended for high-temperature service such as for superheaters and reheaters.
- The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.320 in. [0.4 to 8.1 mm]， inclusive， in wall thickness. Tubing having other dimensions may be furnished， provided such tubes comply with all other requirements of this specification.
- 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.
- Optional supplementary requirements are provided and， when one or more of these are desired， each shall be so stated in the order.
- The values stated in either inch-pound units or SI units are to be regarded separately as standard. (A combination of values from the two systems may result in nonconformance with the specification.) The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.
Chemical Composition
| Grade | C | Si | Mn | Cr | Ni | S | P | Fe |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 1.0 | 2 | 18 – 20 | 8 – 11 | 0.03 | 0.045 | Bal. |
Mechanical Properties
Grade | Tensile Strength (Mpa) | Yield Point (Mpa) | Elongation (%) |
|---|---|---|---|
| TP304 | 515 | 205 | 35 |
APPLICATION:
- Heat Exchangers， Condensers & Pressure Vessels
- Chemical & Petrochemical
- Gas Industry
- Power Generation
- Pressure Vessels
- Marine Equipments
- Food & Beverage Processing
- Automotive
- Pulp & Paper
Quality Control:
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms， which ensures trouble-free expansion， welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage， and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation， every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
