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Your ASTM A691 EFW Steel Pipe manufacturer in China
LONGMA as China leading ASTM A691 Chrome Moly EFW steel pipe manufacturer since 2003, supply tens of thousands of tons of ASTM A691 steel pipe to the world every year. These pipes are manufactured in Electric-Fusion-Welded process, and fabricated with Chrome Moly Steel Plate in ASTM A387. ASTM A691 specification covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures.
- Grade: 1Cr, 1-1/4Cr, 2-1/4Cr
- Class: 20, 21, 22, 30, 40, 50
- Out Diameter: 60.3-660.4mm(2″-26″)
- Wall Thickness: 4-25.4mm
- Length: 3-18 meters
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Our Certifications
Our ASTM A691 EFW Steel Pipe Product List
Longma is one of the leading ASTM A691 1Cr, 1 1/4Cr, 2 1/4Cr CL22 EFW pipes manufacturer since 2003
ASTM A691 GR 1 1/4 Cr Cl22 EFW Steel Pipe
ASTM A691 2-1/4 Cr Class 22 Pipe
ASTM A691 Grade 1.25Cr Alloy Steel Pipe
ASTM A691 Chrome Moly EFW Steel Pipe
ASTM A691 EFW Carbon And Alloy Steel Pipe
ASTM A691 High Quality Steel Pipe
Longma is one of the leading ASTM A691 1Cr, 1 1/4Cr, 2 1/4Cr CL22 EFW pipes manufacturer since 2003
- Foundin 2003, specialized in produce ERW, LSAW, DSAW steel pipes with an annual output of 300,000 tons.
- Two factories, 200,000 square meters of plant.
- Advanced production equipment imported from Germany, 16 JCO production lines.
- More than 300 employees and more than 60 technicians provide efficient production operations and technical services.
- API 5L(No. 5L-0685, Expiration date: 16th,Nov,2024), ISO9001, ISO14001, ISO18001, FPC certificates.
- Exports high quality steel pipes to more than 60 countries around the world.
ASTM A691 EFW Steel Pipe Production Line
Annual output of 300,000 tons of LSAW steel pipes, with out diameter Φ406mm- 1626mm (16″ – 64″), wall thickness 6.0mm- 75mm (1/4″ – 3″), length 18 meters max.
X-Ray Testing
Ultrasonic Testing
Tack Welding
Plate Ultrasonic Testing
Pipe Forming
Pipe End Bevelling
Mechanical Expansion
Hydrostatic Pipe Testing
Our Advantages For ASTM A691 EFW Steel Pipe
Complete Specifications
Out diameter up to 1422mm, and wall thickness up to 100mm, length up to 18 meters, it can cover the needs of most projects.
Good Quality
Complete quality inspection process and inspection equipments, each steel pipe has a unique code can be traced.
Fast Delivery
Our two factory areas, 16 production lines and multi -specifications of circular production. Fastest delivery time 7 days.
Quick Quotation
Dozens of professional salesmen are responsible for customers in different regions, and can provide accurate quotes within as soon as 1 hour.
Accept Small Quantity Order
Tens of thousands of tons of steel pipe inventory can meet your minimum 1 steel pipe needs.
Complete Certificate
API 5L, ISO9001, ISO14001, ISO18001, FPC, etc. While ensuring product quality, it can help you get more orders.
Technical Data For STM A691 EFW Steel Pipe
| Class | Heat Treatment on Pipe | Radiography, see Section | Pressure Test, see Section | |
|---|---|---|---|---|
| 10 | none | none | none | |
| 11 | none | 9 | none | |
| 12 | none | 9 | 8.3 | |
| 13 | none | none | 8.3 | |
| 20 | stress relieved, see 5.3.1 | none | none | |
| 21 | stress relieved, see 5.3.1 | 9 | none | |
| 22 | stress relieved, see 5.3.1 | 9 | 8.3 | |
| 23 | stress relieved, see 5.3.1 | none | 8.3 | |
| 30 | normalized, see 5.3.2 | none | none | |
| 31 | normalized, see 5.3.2 | 9 | none | |
| 32 | normalized, see 5.3.2 | 9 | 8.3 | |
| 33 | normalized, see 5.3.2 | none | 8.3 | |
| 40 | normalized and tempered, see 5.3.3 | none | none | |
| 41 | normalized and tempered, see 5.3.3 | 9 | none | |
| 42 | normalized and tempered, see 5.3.3 | 9 | 8.3 | |
| 43 | normalized and tempered, see 5.3.3 | none | 8.3 | |
| 50 | quenched and tempered, see 5.3.4 | none | none | |
| 51 | quenched and tempered, see 5.3.4 | 9 | none | |
| 52 | quenched and tempered, see 5.3.4 | 9 | 8.3 | |
| 53 | quenched and tempered, see 5.3.4 | none | 8.3 |
| Pipe Grade | Type of Steel | ASTM Specification | HB, max A | |
|---|---|---|---|---|
| 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 | |
| ½ CR | ½% chromium, ½% molybdenum steel | A387/A387M | 2 | 201 |
| 1CR | 1% chromium, ½% molybdenum steel | A387/A387M | 12 | 201 |
| 1 ¼CR | 1 ¼% chromium, ½% molybdenum steel | A387/A387M | 11 | 201 |
| 2 ¼CR | 2 ¼% chromium, 1% molybdenum steel | A387/A387M | 22 | 201 |
| 3CR | 3% chromium, 1% molybdenum steel | A387/A387M | 21 | 201 |
| 5CR | 5% chromium,½% molybdenum steel | A387/A387M | 5 | 225 |
| 9CR | 9% chromium, 1% molybdenum steel | A387/A387M | 9 | 241 |
| 91 | 9% chromium, 1% molybdenum, vanadium, columbium | A387/A387M | 91 | 241 |
| A Hardness values listed are applicable to S3. | ||||
| Pipe Grade | ASTM |
|---|---|
| Specification | Post-Weld Heat-Treat |
| Temperature Range (Stress | carbon-molybdenum steel |
| Relieving), °F (°C) | Normalizing |
| Temperature, | carbon-molybdenum steel |
| max unless | carbon-manganese-silicon steel, normalized |
| otherwise noted, | carbon-manganese-silicon steel |
| °F (°C) | Quenching |
| Temperature, | ½% chromium, ½% molybdenum steel |
| max unless | 1% chromium, ½% molybdenum steel |
| otherwise noted, | 1 ¼% chromium, ½% molybdenum steel |
| °F (°C) | Tempering Temperature, |
| min, °F (°C) | 3% chromium, 1% molybdenum steel |
| CM-65 | A204/A204M |
| CM-70 | A204/A204M |
| CM-75 | A204/A204M |
| CMSH-70 | A537/A537M |
| CMS-75 | A299/A299M |
| CMSH-80 | A537/A537M |
| ½ CR | A387/A387M |
| 1 CR | A387/A387M |
| 1 ¼CR | A387/A387M |
| 2 ¼CR | A387/A387M |
| 3CR | A387/A387M |
| 5CR | A387/A387M |
| 9CR | A387/A387M |
| 91 | A387/A387M |
| min] | 1350 to 1440 [730 to 780] |
| % | 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, Aluminum 0.02 max, titanium 0.01 max, Zirconium 0.01 max.
Class 1 Plates
| 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 |
* Measured on a flat specimen
Class 2 Plates
| Grade | Tensile (MPa) | Yield (MPa) | Elong. (50 mm) | Reduc’n of Area* |
|---|---|---|---|---|
| 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 | – |
* Measured on a flat specimen
| Outside diameter | +/- 0.5% |
|---|---|
| Out of roundness | The difference between major and minor outside diameters 1%. |
| Alignment | Using a 10-ft 3m straightedge placed so that both ends are in contact with the pipe, 1/8in. 3mm. |
| Thickness | Minimum wall thickness at any point in the pipe shall not be more than 0.01 in 0.3mm under the specified nominal thickness. |
| Lengths | Lengths with unmachined ends shall be within -0, +1/2 inch, 0 +13mm of that specified. Lengths with machined ends shall be as agreed between manufacturer and purchaser. |
FAQs
Frequently Asked Questions
Here are some common questions and answers. If you still have questions, don’t hesitate to contact us.
1. What is ASTM A691?
ASTM A691 specification covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures.
2. What is ASTM A691 1-1/4 CR CL 22?
ASTM A691 Grade 1-1/4 CR Class 22 Pipe comes under the A691 specification. This specification covers alloy steel pipes and carbon steel pipes that are fusion welded with filler materials. The pipes can also be fabricated from pressure vessel quality sheets.
3. What grades are included in the A691 standard?
The standard ASTM A691 is included grade CM-65, CM-70, CM-75, CMSH-70,CMS-75, CMSH-80, 1/2 CR, 1 CR, 1 1/4 CR, 2 1/4 CR, 3CR, 5CR, 9CR, 91.
4. What is the composition of ASTM A691?
The ASTM A691 Pipe is made with a composition of chromium, molybdenum, carbon, manganese, phosphorous, silicon, and sulfur. These pipes possess excellent corrosion and oxidation resistance properties. The ASTM A691 Gr 11 Welded Pipe is formed after welding steel with the help of a filler.
5. What areas can ASTM A691 steel pipe be used for?
ASTM A691 Alloy Steel Seamless Pipe is intended for high temperature administration use and they are utilized in different applications like HVAC and Firefighting, Hydro Carbon Processes, Plumbing, Sewage and Waterwell, Oil and Gas, and so forth.
6. What is ASTM A691 2-1/4CR pipe?
ASTM A691 2-1/4CR pipe refers Chrome Moly Welded Pipe used for high temperature and high pressure services. These pipes are manufactured in Electric-Fusion-Welded process, and fabricated with Chrome Moly Steel Plate in ASTM A387 Grade 22. ASTM A691 2-1/4CR pipes has Chrome content 2% to 2.5%, Moly 0.9% to 1.1%. This material equivalent to seamless pipe in ASTM A335 P22 pipe, and also could be made to fittings like elbws, bends, tees, reducers etc.
Featured Case For ASTM A691 EFW Steel Pipe
API 5L PSL2 X70M LSAW Pipe
- Size: 914.4*22.23*12000MM
- Country: Agentina
- Client say: This is not our first cooperation, Longma’s product quality and service has always been very good, which is the reason why we continue......
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- Size: 813*10mm
- Country: Georgia
- Client say: The delivery time I asked for was very short, but they always finished on time. They have very strong organizational and coordination skills. ......
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- Size: 815mm*100mm
- Country: Poland
- Client say: The steel pipes I purchased are used for equipment manufacturing and special engineering, which have extremely strict requirements for product quality. The production......
ASTM A691 1-1/4Cr Cl22 EFW Steel Pipe
- Size: 508*20.62mm
- Country: Singapore
- Client say: Although our order quantity is not large, Longma has been very diligent to help us complete the production and provide relevant documents.
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