ASTM A312 TP321H Seamless Pipes
| Specification Chart | ASTM A312 / ASTM SA312 |
| ASME Standard | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Shapes and Types | Round, Square, Hydraulic, Rectangle, Honed |
| Most Selling types | Seamless, Welded, Fabricated, CDW, 100% X Ray Welded, ERW |
| Pipe End Bevel | Treaded On End, Plain One End, Bevel large end, Bevel both ends, Bevel one end, Beveled One End, Plain Both Ends, Beveled end, Bevel small end, Treaded Both Ends |
| Pipe TDC | Annealed and Pickled, Cold Drawn, Polished, Bright Annealed |
| Roughness and Surface Finish | 2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
| Nominal Wall Thickness | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| We also offer | Export Packaging, Grooving, Polishing, Customer Tagging/ Marking, Machining, Destructive, Export Documentation, Destructive, Non Cutting, Ultrasonic Testing, Material testing, Threading, Color Coding, Threading, Beveling, MTR’s Available |
| How SS 321H pipe is marked? |
Marked Pipe Sample: ANSI B36.19 ASTM A312 TP321H 12" NB SCH 60S SEAMLESS HEAT NO. XXXX |
| SS | 321H |
| Ni | 09 - 12 |
| S | 00.03 max |
| N | 00.10 |
| Cr | 17 – 19 |
| Si | 00.75 max |
| Mn | 2 max |
| C | 00.04 - 0.08 |
| P | 00.045 max |
| TI | 00.70 max |
| MATERIAL | UNS | WERKSTOFF NR. |
| USA | GERMAN | |
| TP321H | S32109 | 1.4878 |
ASTM A312 covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, it is permitted to specify in the order one or more of these supplementary requirements.
Nominal Pipe Size (NPS): 1/8, 1/4, 3/8, 1/2, 3/4, 1, 11/4, 11/2, 2, 21/2 inch
Outside Diameter: 10,3 - 73 mm (0,405 - 2,875 inch)
Wall Thickness: 1,73 - 7,01 (0,068 - 0,276 inch)
Notes:
Steel Grades - TP 304, TP 304L, TP 316, TP 321
Size of pipes in accordance with ANSI/ASME B36. 19M.
All technical requirements in accordance with ASTM A530.
Length tolerance of measured pipes is not greater than +10 mm.
The quality of pipes is ensured by manufacturing process and non-destructive test.
Intergranular corrosion test in accordance with ASTM A262, Practice E is available.
| Sizes | |||
| inch | OD, mm | Wall Thickness, | Max. Length, м |
| 1/8 | 10,3 | 1,73; 2,11 | 12 |
| 1/4 | 13,7 | 2,24; 3,02 | |
| 3/8 | 17,1 | 2,31; 3,20 | |
| 1/2 | 21,3 | 2,11; 3,73 | |
| 3/4 | 26,7 | 2,87; 3,91 | |
| 1 | 33,4 | 3,38; 4,55; 6,35 | 10 |
| 1 1/4 | 42,4 | 3,56; 4,85; 6,35 | |
| 1 1/2 | 48,3 | 3,68; 5,03; 7,14 | |
| 2 | 60,3 | 3,58; 3,91; 4,37; 4,78; 6,35; 6,94; 7,14 | |
| 2 1/2 | 73,0 | 3,58; 3,95; 4,37; 4,78; 5,16; 5,49; 6,35; 7,01 | |
| Mechanical properties | |||
| Steel Grade | Tensile Strength, N/mm2 (min) | Yield Strength, N/mm2 (min) | Elongation, % (min) |
| TP304 | 515 | 205 | 35 |
| TP304L | 485 | 170 | 35 |
| TP316 | 515 | 205 | 35 |
| TP316L | 485 | 170 | 35 |
| TP321 | OD < 17,1 mm - 515; | OD < 17,1 mm - 205; | 35 |
| OD > 17,1 mm - 485 | OD > 17,1 mm - 170 | ||
| Chemical Composition (%, max) | ||||||||
| Steel Grade | C | Si | Mn | Cr | Ni | Mo | S | P |
| TP304 | 0,08 | 0,75 | 2 | 18 - 20 | 8-11 | - | 0,03 | 0,04 |
| TP304L | 0,035 | 0,75 | 2 | 18 - 20 | 8-13 | - | 0,03 | 0,04 |
| TP316 | 0,08 | 0,75 | 2 | 16 - 18 | 11-14 | 2-3 | 0,03 | 0,04 |
| TP316L | 0,035 | 0,75 | 2 | 16 - 18 | 10-15 | 2-3 | 0,03 | 0,04 |
| TP321 | 0,08 | 0,75 | 2 | 17 - 20 | 9-13 | - | 0,03 | 0,04 |
