Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
| Choose | When | Watch-outs |
|---|---|---|
| 1-1/4CR | Lower chrome-moly EFW | Align with P11-class duty |
| 2-1/4CR | P22-class EFW service | State class / HT |
| 91 / 92 | CSEF EFW when specified | Strict welding controls |
ASTM A691 Grade: ____ Class: ____ OD: ____ Wall: ____ Qty: ____ HT/NDE: ____ MTC: 3.1/3.2 Destination: ____
Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.
Savoy Piping Inc. supplies ASTM A691 electric-fusion-welded (EFW) chrome moly pipe fabricated from pressure-vessel-quality plate for high-pressure service at elevated temperatures — especially in large diameters where seamless chrome moly is impractical.
A691 is ordered by grade (plate chemistry) and class (heat treatment + radiography + pressure-test combination). That class detail is what keeps inspection packages clean; a grade alone is not enough on a serious PO.
Grades we cover: 1-1/4CR (~P11), 2-1/4CR (~P22), 5CR (~P5), 9CR (~P9), and 91, 92 (CSEF modified 9Cr). Companion ASME page: ASME SA691.
| ASME SA691 Alloy Steel EFW Pipes Specification | ASTM A691 / ASME SA691 |
| ASME SA691 Alloy Steel EFW Pipes Grades | ASTM A691 — 1-1/4CR, 2-1/4CR, 3CR, 5CR, 9CR, 91, 92 |
| ASME SA691 Alloy Steel EFW Pipes Type | EFW (Electric Fusion Welded Pipes) |
| ASME SA691 Alloy Steel EFW Pipes Class Designation | CLASS 10, ,11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43 |
| ASME SA691 Alloy Steel EFW Pipes Outer Diameter Size | 16" NB to 100" NB (Nominal Bore Size) |
| ASME SA691 Alloy Steel EFW Pipes Wall Thickness | Schedule 20 to Schedule XXS (Heavier On Request) Up to 75 mm Thickness |
| ASME SA691 Alloy Steel EFW Pipes Length | 5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| ASME SA691 Alloy Steel EFW Pipes Ends | Plain Ends / Beveled Ends / Coupling |
| ASME SA691 Alloy Steel EFW Pipes Delivery Conditions | As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T |
| ASME SA691 Alloy Steel EFW Pipes Coating | Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
| ASME SA691 Alloy Steel EFW Pipes Other Testing | NACE MR0175, NACE TM0177, NACE TM0284, Charpy V-Notch Test, Radiograph HIC Examination, XRAY, Ultrasonic EXAMINATION, Liquid Penetrant, Magnetic Particle, HIC Test, SSC Test, SWC, H2 Service, IBR, PWHT Etc. |
| ASME SA691 Alloy Steel EFW Pipes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API. |
| ASME SA691 Alloy Steel EFW Pipes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment |
| ASME SA691 Alloy Steel EFW Pipess Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| ASME SA691 Alloy Steel EFW Pipes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| ASME SA691 Alloy Steel EFW Pipes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
ASTM A691 covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate and suitable for high-pressure service at elevated temperatures. The specification nominally addresses larger pipe (commonly 16 in. OD and above) with substantial wall thickness, though other dimensions may be furnished when all requirements are met.
Grade designates the plate analysis (for example 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91). Class designates manufacturing heat treatment, whether the longitudinal weld is radiographically examined, and whether the pipe is pressure tested. Buyers should state both clearly.
A691 is the large-diameter EFW route that complements seamless ASTM A335 chrome moly pipe and ASTM A213 tubes in complete Cr-Mo systems.
Use 1-1/4CR for intermediate Cr-Mo duty (~P11). Use 2-1/4CR for hotter ~P22 service. Use 5CR / 9CR for higher-chromium process/refinery duty. Use 91 when CSEF modified 9Cr is required. Always confirm plate specification, class and welding/PWHT requirements with the project engineer.
| Class | Heat Treatment on Pipe | Radiography, see Section | Pressure Test, see: |
| A691 / SA691 EFW Pipe Class 10 | none | none | none |
| A691 / SA691 EFW Pipe Class 11 | none | 9 | none |
| A691 / SA691 EFW Pipe Class 12 | none | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 13 | none | none | 8.3 |
| A691 / SA691 EFW Pipe Class 20 | stress relieved, see 5.3.1 | none | none |
| A691 / SA691 EFW Pipe Class 21 | stress relieved, see 5.3.1 | 9 | none |
| A691 / SA691 EFW Pipe Class 22 | stress relieved, see 5.3.1 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 23 | stress relieved, see 5.3.1 | none | 8.3 |
| A691 / SA691 EFW Pipe Class 30 | normalized, see 5.3.2 | none | none |
| A691 / SA691 EFW Pipe Class 31 | normalized, see 5.3.2 | 9 | none |
| A691 / SA691 EFW Pipe Class 32 | normalized, see 5.3.2 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 33 | normalized, see 5.3.2 | none | 8.3 |
| A691 / SA691 EFW Pipe Class 40 | normalized and tempered, see 5.3.3 | none | none |
| A691 / SA691 EFW Pipe Class 41 | normalized and tempered, see 5.3.3 | 9 | none |
| A691 / SA691 EFW Pipe Class 42 | normalized and tempered, see 5.3.3 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 43 | normalized and tempered, see 5.3.3 | none | 8.3 |
| Pipe Grade | Type of Steel | ASTM Specification | HB, max A | |
| Number | Grade | |||
| CM-65 | carbon-molybdenum steel | A 204/ A204M | A | 201 |
| CM-70 | carbon-molybdenum steel | A 204/ A204M | B | 201 |
| CM-75 | carbon-molybdenum steel | A 204/ A204M | C | 201 |
| CMSH-70 | carbon-manganese-silicon steel, normalized | A 537/A 537M | 1 | |
| CMS-75 | carbon-manganese-silicon steel | A 299/A 299M | … | … |
| CMSH-80 | carbon-manganese-silicon steel, quenched and tempered | A 537/A 537M | 2 | |
| 1/2 CR | 1/2 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 2 | 201 |
| 1CR | 1 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 12 | 201 |
| 1-1/4 CR | 1-1/4 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 11 | 201 |
| 2-1/4 CR | 2-1/2 % chromium, 1 % molybdenum steel | A 387/ A 387M | 22 | 201 |
| 3CR | 3 % chromium, 1 % molybdenum steel | A 387/ A 387M | 21 | 201 |
| 5CR | 5 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 5 | 225 |
| 9CR | 9 % chromium, 1 % molybdenum steel | A 387/ A 387M | 9 | 241 |
| 91 | 9 % chromium, 1 % molybdenum, vanadium-modified steel (CSEF) | A 387/ A 387M | 91 | 241 |
| Pipe Grade | ASTM Specification | Post-Weld Heat-Treat Temperature Range (Strees Relieving), F ( C) | Normalizing Temperature, max unless otherwise noted, F ( C) | Quenching Temperature, max unless otherwise noted, F ( C) | Tempering Temperature, min, F ( C) |
| CM-65 | A204/ A204M | 1100 to 1200 (59 to 650) | 1700 (925) | … | … |
| CM-70 | A204/ A204M | 1100 to 1200 (59 to 650) | 1701 (925) | … | … |
| CM-75 | A204/ A204M | 1100 to 1200 (59 to 650) | 1702 (925) | … | … |
| CMSH-70 | A537/A 537M | 1100 to 1200 (59 to 650) | 1703 (925) | … | … |
| CMS-75 | A 299/A 299M | 1100 to 1200 (59 to 650) | 1704 (925) | … | … |
| CMSH-80 | A537/A 537M | 1100 to 1200 (59 to 650) | A | 1700 (925) | 1100 to 1250 (59 to 675) |
| 1/2 CR | A387 / A387M | 1100 to 1300 (59 to 705) | 180 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 1CR | A387 / A387M | 1100 to 1350 (59 to 730) | 181 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 1-1/4 CR | A387 / A387M | 1100 to 1375 (59 to 74) | 182 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 2-1/4 CR | A387 / A387M | 1200 to 1400 (650 to 760) | 183 (1010) | 1700 (925) | 1250 to1400 (675 to 760) |
| 3CR | A387 / A387M | 1200 to 1400 (650 to 760) | 184 (1010) | 1700 (925) | 1250 to1400 (675 to 760) |
| 5CR | A387 / A387M | 1200 to 1400 (650 to 760) | 185 (1010) | 1700 (925) | 1300 to 1400 (705 to 760) |
| 9CR | A387 / A387M | 1325 to 1375 (715 to 74) | B | … | 1325 to 1375 (715 to 74) |
| 91 | A387 / A387M | 1350 to 1420 (730 to 770) | 1350 to 1420 (730 to 770) | 190 min (1040 min) | 1350 to 1440 (730 to 780) |
B 9CR steel is an air-hardenable steel, at times retaining down to near atmospheric temperature. Good practice is to allow the steel to cool to 15 F or Lower before subjecting the steel to a tempering treatment or post-weld heat treatment.
ASTM A691 is the specification for electric-fusion-welded carbon and alloy steel pipe made from pressure-vessel-quality plate for high-pressure service at elevated temperatures, commonly used in large diameters.
Grade identifies the plate chemistry (for example 2-1/4CR or 91). Class identifies heat treatment during manufacture, whether the weld is radiographed, and whether the pipe is pressure tested.
Use A335 for seamless chrome moly pipe. Use A691 when the design requires EFW plate-welded pipe — typically larger OD / fabrication packages. Product forms are not interchangeable without approval.
We supply ASTM A691 / ASME SA691 in Grades 1-1/4CR, 2-1/4CR, 5CR, 9CR and 91, with documentation and inspection options aligned to the purchase order.
We supply this product for domestic and export projects with MTC (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, Incoterms and inspection needs on the RFQ.