An electric fusion welded pipe meets ASTM A691 specifications. The pipes range from 16 inches to 100 inches in diameter. Carbon steel containing phosphorus, sulphur, manganese, and carbon makes up the A691 pipe material. The different grades of the material have distinct compositions. High quality pressure vessel grade plates and sheets are used to fabricate the A691 Cl22 pipe, together with filler materials. The pipes' wall thicknesses range from 2 mm to 100 mm. The schedules of the A691 Cl 11 Pipe fluctuate greatly from sch5 to XXS and heavier depending on the outside diameter of the pipes and the wall thicknesses. Standard, extra-strong, and double-extra-strong wall pipes are available. There are several classes of pipes as well. The A691 1-1/4cr Cl22 Seamless Pipe is either plain, threaded on one end, or threaded on both. Additionally, each end may be distinct and feature a bevel. Chromium is included in the ASTM A691 Grade 2.1/4cr composition in addition to the typical amounts of carbon steel. The material is more resistant to corrosion as a result. Construction and other structural uses, as well as other frames and structures utilised in several industrial applications, all use the ASTM A691 9cr Cl22. The 201 brinell hardness score of the ASTM A691 5cr ERW Pipes indicates their high hardness. Sheets, pipes, and tubes of the same quality are made using the ASTM A691 Material.
ASTM A691 Grade 2.1/4CR Seamless Pipe
ASTM A691 Welded Pipe
ASTM A691 Grade 1-1/4 CR Class 22 Pipe
| Grade | Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR, GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75 |
| Size | 1/2” NB to 36” NB |
| Thickness | 3-12mm |
| Schedules | SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Class Designation | Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73 |
| ASTM A691 Grades | ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m, |
| Origin | European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material) |
| Tolerance | Cold drawn pipe: +/-0.1mm
Cold rolled pipe: +/-0.05mm |
| Craft | Cold rolled and Cold drawn |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
| Length | Standard Double & In Cut length also. |
| End | Plain End, Beveled End, Treaded |
| Specialized in | Large Diameter ASTM A691 Pipe |
| Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
| Application | Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
Astm A691 Gr.1.25 Cr/cl Saw Steel Pipes
14 inch schedule 40 ASTM A691 steel pipe
ASTM A691 Gr.1.25 CR/CL SAW Steel Pipe
1/2 inch, ASTM A691 Grade 91 Pipe
ASTM A691 Seamless Pipes, Nominal Size: 3 inch
schedule 40 ASTM A691 Welded Pipes
Steel Pipes EFSW ASTM A691 CLASS 42, Size: 2 inch
1.5mm thickness ASTM A691 Round Pipes
Astm A691 1 4 Cr Cl22 Welded Steel Pipes
ASTM A691 seamless steel thickness 4mm pipe tube
ASTM A691 Gr.5cr Cl22 EFW Pipes
hot-rolled 100mm diameter square pipe ASTM A691
| Class | Heat Treatment on Pipe Section see: | Radiography, see Section |
Pressure Test, see : |
| 10 | none | none | none |
| 11 | none | 9 | none |
| 12 | none | 9 | 8.3 |
| 13 | none | none | 8.3 |
| 21 | stress relieved, see 6.3.1 | none | none |
| 21 | stress relieved, see 6.3.1 | 9 | none |
| ASTM A691 Class 22 | stress relieved, see 6.3.1 | 9 | 8.3 |
| 23 | stress relieved, see 6.3.1 | none | 8.3 |
| 31 | normalized, see 6.3.2 | none | none |
| 31 | normalized, see 6.3.2 | 9 | none |
| 32 | normalized, see 6.3.2 | 9 | 8.3 |
| 33 | normalized, see 6.3.2 | none | 8.3 |
| 40 | normalized and tempered, see 6.3.3 | none | none |
| 43 | normalized and tempered, see 6.3.3 | 9 | none |
| 43 | normalized and tempered, see 6.3.3 | 9 | 8.3 |
| 43 | normalized and tempered, see 6.3.3 | none | 8.3 |
| 50 | quenched and tempered, see 6.3.4 | none | none |
| 51 | quenched and tempered, see 6.3.4 | 9 | none |
| 52 | quenched and tempered, see 6.3.4 | 9 | 8.3 |
| 53 | quenched and tempered, see 6.3.4 | none | 8.3 |
| 60 | normalized and precipitation heat none none treated | none | none |
| 61 | normalized and precipitation heat none none treated | 9 | none |
| 62 | normalized and precipitation heat none none treated | 9 | 8.3 |
| 63 | normalized and precipitation heat none none treated | none | 8.3 |
| 70 | normalized and precipitation heat none none treated | none | none |
| 71 | normalized and precipitation heat none none treated | 9 | none |
| 72 | normalized and precipitation heat none none treated | 9 | 8.3 |
| 73 | normalized and precipitation heat none none treated | none | 8.3 |
| Grade | Tensile (MPa) | Yield (MPa) | Elong. (50mm) | Reduc’n of Area* |
|---|---|---|---|---|
| 1CR | 380 – 550 | 230 min | 22% min | – |
| 1-1/4CR | 415 – 585 | 240 min | 22% min | – |
| 2-1/4CR, 5CR, 9CR | 415 – 585 | 205 min | 18% min | 40% min |
| 91 | 415 – 585 | 205 min | 18% min | 40% min |
| 2 | 485 – 620 | 310 min | 22% min | – |
| 1-1/4CR | 515 – 690 | 310 min | 22% min | – |
| 1CR | 450 – 585 | 275 min | 22% min | – |
| 2-1/4CR, 5CR, 9CR | 515 – 690 | 310 min | 18% min | 40% min |
| 91 | 585 – 760 | 415 min | 18% min | – |
| Pipe Grade | ASTM Specification | Post-Weld Heat-Treat Temperature Range (Stress Relieving), °F (°C) | Normalizing Temperature max unless otherwise noted, | Quenching Temperature max unless otherwise noted,°F (°C) | Tempering Temperature, min, °F (°C) |
| CM-65 | A 204/A 204M | 1100 to 1200 (590 to 650) | 1700 (925) | … | … |
| CM-70 | A 204/A 204M | 1100 to 1200 (590 to 650) | 1700 (925) | … | … |
| CM-75 | A 204/A 204M | 1100 to 1200 (590 to 650) | 1700 (925) | … | … |
| CMSH-70 | A 537/A 537M | 1100 to 1200 (590 to 650) | 1700 (925) | … | … |
| CMS-75 | A 299/A 299M | 1100 to 1200 (590 to 650) | 1700 (925) | … | … |
| CMSH-80 | A 537/A 537M | 1100 to 1200 (590 to 650) | A | 1700( 925) | 1100 to 1250 (590 to 675) |
| 1/2CR | A 387/A 387M | 1100 to 1300 (590 to 705) | 1850 (1010) | 1700( 925) | 150 to 1375 (620to745) |
| 1CR | A 387/A 387M | 1100 to 1350 (590 to 730) | 1850 (1010) | 1700 (925) | 150 to 1375 (620to745) |
| 11⁄4CR | A 387/A 387M | 1100 to 1375 (590 to 745) | 1850 (1010) | 1700 (925) | 150 to 1375 (620to745) |
| 21⁄4CR | A 387/A 387M | 1200 to 1400 (650 to 760) | 1850 (1010) | 1700 (925) | 250 to 1400(675 to760) |
| 3CR | A 387/A 387M | 1200 to 1400 (650 to 760) | 1850 (1010) | 1700 (925) | 250 to1400 (675 to760) |
| 5CR | A 387/A 387M | 1200 to 1400 (650 to 760) | 1850 (1010) | 1650 (900) | 1300 to1400 (705 to760) |
| 9CR | A 387/A 387M | 1325 to 1375 (715 to 745) | B | … | 1325 to1375 (715 to745) |
| ASTM A691 Gr.91 | A 387/A 387M | 1350 to 1420 (730 to 770) | 11900 to 2000 (1040 to 1095) | 1900 min (1040 min) | 1350 to 1440 (730 to 780) |
Pipe Grade |
Type of Steel |
ASTM Specification |
HB, max |
|
Number |
Grade |
|||
| CM-65 | carbon-molybdenum steel | A204/A204M | A | 201 |
| CM-70 | carbon-molybdenum steel | A204/A204M | B | 201 |
| CM-75 | carbon-molybdenum steel | A204/A204M | C | 201 |
| CMSH-70 | carbon-manganese-silicon steel, normalized | A537/A537M | 1 | |
| CMS-75 | carbon-manganese-silicon steel | A299/A299M | — | — |
| CMSH-80 | carbon-manganese-silicon steel, quenched and tempered | A537/A537M | 2 | |
| 1/2 CR | 1/2 % chromium, 1/2 % molybdenum steel | A387/A387M | 2 | 201 |
| 1 CR | 1 % chromium, 1/2 % molybdenum steel | A387/A387M | 12 | 201 |
| 1 1/4 CR | 1 1/4 % chromium, 1/2 % molybdenum steel | A387/A387M | 11 | 201 |
| 2 1/4 CR | 2 1/4 % chromium, 1 % molybdenum steel | A387/A387M | 22 | 201 |
| 3 CR | 3 % chromium, 1 % molybdenum steel | A387/A387M | 21 | 201 |
| 5 CR | 5 % chromium, 1/2 % molybdenum steel | A387/A387M | 5 | 225 |
| 9 CR | 9 % chromium, 1 % molybdenum steel | A387/A387M | 9 | 241 |
| 91 | 9 % chromium, 1 % molybdenum, vanadium, columbium | A387/A387M | 91 | 241 |
| 1CR | 1-1/4CR | 2-1/4 CR | 5 CR | 9 CR | 91 | |
|---|---|---|---|---|---|---|
| C | 0.05-0.17 | 0.05-0.17 | 0.05-0.15 | 0.15 | 0.15 | 0.08-0.12 |
| Mn | 0.40-0.65 | 0.40-0.65 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| P | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 |
| S | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 |
| Si | 0.15-0.40 | 0.50-0.80 | 0.50 | 0.50 | 1.00 | 0.20-0.50 |
| Cr | 0.80-1.15 | 1.00-1.50 | 2.00-2.50 | 4.00-6.00 | 8.00-10.00 | 8.00-9.50 |
| Mo | 0.45-0.60 | 0.45-0.65 | 0.90-1.10 | 0.45-0.65 | 0.90-1.10 | 0.85-1.05 |
| V | – | – | – | – | 0.04 | 0.18-0.25 |
*Grade 91 also includes restrictions on Nickel 0.40 max, Columbium 0.06-0.10, Nitrogen 0.030-0.070, Aluminium 0.02 max, titanium 0.01 max, Zirconium 0.01 max.
| Size | MSL Make | ISMT make | JSL Make |
|---|---|---|---|
| 1/2" | 4,264.71 | 4,257.35 | 4,272.06 |
| 3/4" | 4,044.12 | 4,036.76 | 4,051.47 |
| 1" | 3,897.06 | 3,889.71 | 3,904.41 |
| 1.25" | 3,852.94 | 3,845.59 | 3,860.29 |
| 1.5" | 3,750.00 | 3,742.65 | 3,757.35 |
| ASTM A691 Grade 1-1/4 CR Class 22 Pipe OD mm |
Pipe WT mm |
in. | Sch | Kg/m |
|---|---|---|---|---|
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.352) | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1¼ | 10S | 2.73 |
| 42.16 | 3.56 | 1¼ | 40S | 3.44 |
| 42.16 | 4.85 | 1¼ | 80S | 4.53 |
| 42.16 | 6.352) | 1¼ | 160 | 5.69 |
| 48.26 | 2.77 | 1½ | 10S | 3.16 |
| 48.26 | 3.68 | 1½ | 40S | 4.11 |
| 48.26 | 5.08 | 1½ | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.742) | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2½ | 10S | 5.35 |
| 73.03 | 5.16 | 2½ | 40S | 8.77 |
| 73.03 | 7.01 | 2½ | 80S | 11.59 |
| 88.90 | 3.05 | 3 | 10S | 6.56 |
| 88.90 | 5.49 | 3 | 40S | 11.47 |
| 88.90 | 7.62 | 3 | 80S | 15.51 |
| 88.90 | 11.132) | 3 | 160 | 21.67 |
| 101.60 | 3.05 | 3½ | 10S | 7.53 |
| 101.60 | 5.74 | 3½ | 40S | 13.78 |
| 101.60 | 8.08 | 3½ | 80S | 18.92 |
| 114.30 | 3.05 | 4 | 10S | 8.50 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 114.30 | 8.56 | 4 | 80S | 22.67 |
| 114.30 | 13.492) | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.882) | 5 | 160 | 49.87 |
| 168.28 | 3.4 | 6 | 10S | 14.04 |
| 168.28 | 7.11 | 6 | 40S | 28.69 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 168.28 | 14.27 | 6 | 120 | 54.75 |
| 168.28 | 18.262) | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.7 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.012) | 8 | 160 | 112.97 |