ASTM A249 TP316/TP316L ASME SA249 TP316L Welded Austenitic Steel tube, heat exchanger tube,condenser tubes
We are the professional exporter and supplier of ASTM A249 TP316 Stainless Steel Welded Tube,ASTM A249 TP316L welded tube ,ASTM A249 TP316L welded tube for heat exchanger,condenser,
A249 316 316L stainless steel tube is applied for boiler, heat exchanger, condenser equipment, stainless steel 316/316L is excellent corrosion resistance in welded stainless steel heat exchaner tube, better than 304/304L stainless steel,
Standard:ASTM A249
Grade: TP304/304L/304H, TP316/316L/316H, TP309S/309H, TP310S/310H, TP316H, TP321/321H, TP347/347H
ASTM A249 tubing size: OD: 4 – 321mm WT: 0.4 – 8.1mm
Length: fixed length or random
Delivery condition: annealing/pickling/ passivization
Packaging: bundle, plywood case.
NDT: Hydrostatic, Eddy currency,etc
ASTM_A249 Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
1. Scope
1.1 This specification2 covers nominal-wall-thickness welded tubes and heavily cold worked 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.
1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, 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.
1.3 The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 12 in. [304.8 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.
1.4 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.
TIG Welding Stainless Steel Tube
We manufacture ASTM A249 TP304,A249 TP304L stainless steel welded tube using TIG (Tungsten Inert Gas) welding method, TIG welding can protect tube surface from oxidation, making welding bead integrity with base metal, and the same level, argon tungsten-arc welding usually is used for thin wall thickness stainless steel tube, and this welding type stainless steel tubes are suitable for heat exchanger system.
Annealed Pickling Stainless Steel Welded Tube
A249 welded tube should be annealed solution after welding, general Austenitic stainless steel heat treatment temperature from 1040 to 1150 degree Celsius, different grades have different annealing temperatures, this process can remove oxidation scale, plain grain structure and relieve stress, making tube soft and easy to fabricate, after annealing, ss tubes should be pickling in mixture of acid, removing scale and cleaning the surface, then passivation condition form a layer of oxidation film protecting tubes.
Bright Annealing Stainless Steel Welded Tube
Bright annealing (BA) finish is an another surface condition, it improve tube surface bright level and make surface more clean, a perfect additional requirement beside annealing passivation finishing.
Chemical Composition of ASTM A249 TP316L Stainless Steel tube
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
| 0.035 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
Mechanical Properties of ASTM A249 TP316L Stainless Steel tubes
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 485 min | 170 min | 35 min | 90 max |
ASTM A249 TP316L stainless steel welded tube dimension tolerance:
| OD | THK. | L | |
| ＜25.40mm | ±0.10mm | ±10.00% | OD＜50.8mm +3.0mm -0mm
OD≥50.8mm +5.0 -0mm |
| ≥25.4mm~38.1mm | ±0.15mm | ||
| ≥38.1mm~50.8mm | ±0.20mm | ||
| ≥50.8mm~63.5mm | ±0.25mm | ||
| ≥63.5mm~76.2mm | ±0.30mm | ||
| ≥76.2mm~101.6mm | ±0.38mm | ||
| ≥101.6mm~190.5mm | +0.38mm -0.64mm | ||
| ≥190.5mm~228.6mm | +0.38mm -1.14mm | ||
ASTM A249 covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from the austenitic steels with various grade
