|
| ขั้นต่ำ: | 1 ตัน |
| ราคา: | 800-1000 USD/Tons |
| การบรรจุแบบมาตรฐาน: | ในการรวมกลุ่มหรือในกล่องไม้ |
| ระยะเวลาการจัดส่ง: | 20-30 วันสำหรับผลิตภัณฑ์ |
| วิธีการจ่ายเงิน: | L/C, D/A, D/P, T/T, เวสเทิร์นยูเนี่ยน, MoneyGram |
| ความสามารถในการจัดหา: | 60,000 ตัน / ตันต่อปี |
GB/T 14291 welded steel pipes are designed for ore powder, ore pulp, mineral slurry, and dredging pipeline service where pipe strength, weld integrity, dimensional stability, and abrasion allowance are critical. The current GB/T 14291-2016 standard is titled “Welded steel pipe for ore pulp transportation”, was issued on August 29, 2016, and implemented on July 1, 2017. It applies to welded steel pipes used for ore powder, ore slurry, river dredging, and harbor dredging pipeline systems.
| Item | Description |
|---|---|
| Material | Carbon / low-alloy welded steel pipe |
| Standard | GB/T 14291-2016 |
| Grades | L245J/BJ, L290J/X42J, L320J/X46J, L360J/X52J, L390J/X56J |
| Manufacturing Process | ERW / HFW welded pipe; other welded processes by agreement |
| Outside Diameter | Common range: 114.3–1420 mm; project sizes by order |
| Wall Thickness | Common range: 4–25 mm; heavier wall by slurry pressure and wear allowance |
| Length | 1–12 m, customizable |
| Tolerance Range | According to GB/T 14291 order class; tighter OD / WT tolerance by agreement |
| Straightness | Controlled for field welding and pipe rotation stability; project requirement by purchase order |
| Surface Condition | Bare, black painted, anti-rust oil, external coating, internal lining or coating by agreement |
| Heat Treatment | As-welded or weld seam heat-treated, depending on grade, welding process, and purchaser requirement |
| Inspection | Chemical analysis, tensile test, weld inspection, dimensional inspection, hydrostatic test / NDT as required |
| Buyer Concern | Our Control Method |
|---|---|
| Abrasion and early wall loss in ore slurry service | We recommend wall-thickness selection based on slurry concentration, velocity, particle size, pressure, and maintenance cycle. Internal lining, coating, or wear allowance can be specified for high-solid ore pulp lines. |
| Weld reliability during pressure cycling and field installation | We control weld seam quality through weld-zone inspection, dimensional checks, hydrostatic testing or NDT, and traceable heat documentation. |
| Grade selection uncertainty | We match L245J/BJ to L390J/X56J according to pressure class, route length, support condition, and welding requirements, avoiding unnecessary over-specification while keeping yield strength and toughness appropriate for slurry service. |
| Standard System | Applicable Reference |
|---|---|
| GB | GB/T 14291-2016, welded steel pipe for ore pulp transportation |
| ASTM | ASTM A53 / ASTM A139 can be referenced for general welded carbon steel pipe comparison, not as direct grade equivalents |
| EN | EN 10217 series can be referenced for welded steel tubes for pressure purposes, subject to project comparison |
| GOST | GOST welded steel pipe standards may be reviewed for CIS-region project compatibility |
| JIS | JIS G3452 / JIS G3454 may be referenced for carbon steel pipe comparison, not direct slurry-grade equivalents |
| API | API 5L grade names such as X42, X46, X52, and X56 are useful for grade-strength comparison, but GB/T 14291 purchase should follow the GB grade and project specification |
Ore-processing plant tailings slurry discharge pipeline — used to transport abrasive tailings slurry from the concentrator thickener or tailings pump station to the tailings storage facility.
| Grade | C % max | Si % max | Mn % | P % max | S % max | Cr % | Nb % max | V % max | Ti % max | CE max | Pcm max |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L245J/BJ | 0.22 | 0.45 | 0.45–1.40 | 0.025 | 0.015 | — | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L290J/X42J | 0.22 | 0.45 | 1.30–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L320J/X46J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L360J/X52J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L390J/X56J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 |
| Grade | Minimum Yield Strength, MPa | Tensile Strength, MPa | Minimum Elongation, % |
|---|---|---|---|
| L245J/BJ | 245 | 415–760 | 22 |
| L290J/X42J | 290 | 415–760 | 20 |
| L320J/X46J | 320 | 435–760 | 18 |
| L360J/X52J | 360 | 460–760 | 16 |
| L390J/X56J | 390 | 490–760 | 14 |
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
|
|
| ขั้นต่ำ: | 1 ตัน |
| ราคา: | 800-1000 USD/Tons |
| การบรรจุแบบมาตรฐาน: | ในการรวมกลุ่มหรือในกล่องไม้ |
| ระยะเวลาการจัดส่ง: | 20-30 วันสำหรับผลิตภัณฑ์ |
| วิธีการจ่ายเงิน: | L/C, D/A, D/P, T/T, เวสเทิร์นยูเนี่ยน, MoneyGram |
| ความสามารถในการจัดหา: | 60,000 ตัน / ตันต่อปี |
GB/T 14291 welded steel pipes are designed for ore powder, ore pulp, mineral slurry, and dredging pipeline service where pipe strength, weld integrity, dimensional stability, and abrasion allowance are critical. The current GB/T 14291-2016 standard is titled “Welded steel pipe for ore pulp transportation”, was issued on August 29, 2016, and implemented on July 1, 2017. It applies to welded steel pipes used for ore powder, ore slurry, river dredging, and harbor dredging pipeline systems.
| Item | Description |
|---|---|
| Material | Carbon / low-alloy welded steel pipe |
| Standard | GB/T 14291-2016 |
| Grades | L245J/BJ, L290J/X42J, L320J/X46J, L360J/X52J, L390J/X56J |
| Manufacturing Process | ERW / HFW welded pipe; other welded processes by agreement |
| Outside Diameter | Common range: 114.3–1420 mm; project sizes by order |
| Wall Thickness | Common range: 4–25 mm; heavier wall by slurry pressure and wear allowance |
| Length | 1–12 m, customizable |
| Tolerance Range | According to GB/T 14291 order class; tighter OD / WT tolerance by agreement |
| Straightness | Controlled for field welding and pipe rotation stability; project requirement by purchase order |
| Surface Condition | Bare, black painted, anti-rust oil, external coating, internal lining or coating by agreement |
| Heat Treatment | As-welded or weld seam heat-treated, depending on grade, welding process, and purchaser requirement |
| Inspection | Chemical analysis, tensile test, weld inspection, dimensional inspection, hydrostatic test / NDT as required |
| Buyer Concern | Our Control Method |
|---|---|
| Abrasion and early wall loss in ore slurry service | We recommend wall-thickness selection based on slurry concentration, velocity, particle size, pressure, and maintenance cycle. Internal lining, coating, or wear allowance can be specified for high-solid ore pulp lines. |
| Weld reliability during pressure cycling and field installation | We control weld seam quality through weld-zone inspection, dimensional checks, hydrostatic testing or NDT, and traceable heat documentation. |
| Grade selection uncertainty | We match L245J/BJ to L390J/X56J according to pressure class, route length, support condition, and welding requirements, avoiding unnecessary over-specification while keeping yield strength and toughness appropriate for slurry service. |
| Standard System | Applicable Reference |
|---|---|
| GB | GB/T 14291-2016, welded steel pipe for ore pulp transportation |
| ASTM | ASTM A53 / ASTM A139 can be referenced for general welded carbon steel pipe comparison, not as direct grade equivalents |
| EN | EN 10217 series can be referenced for welded steel tubes for pressure purposes, subject to project comparison |
| GOST | GOST welded steel pipe standards may be reviewed for CIS-region project compatibility |
| JIS | JIS G3452 / JIS G3454 may be referenced for carbon steel pipe comparison, not direct slurry-grade equivalents |
| API | API 5L grade names such as X42, X46, X52, and X56 are useful for grade-strength comparison, but GB/T 14291 purchase should follow the GB grade and project specification |
Ore-processing plant tailings slurry discharge pipeline — used to transport abrasive tailings slurry from the concentrator thickener or tailings pump station to the tailings storage facility.
| Grade | C % max | Si % max | Mn % | P % max | S % max | Cr % | Nb % max | V % max | Ti % max | CE max | Pcm max |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L245J/BJ | 0.22 | 0.45 | 0.45–1.40 | 0.025 | 0.015 | — | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L290J/X42J | 0.22 | 0.45 | 1.30–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L320J/X46J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L360J/X52J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 | 0.05 | 0.04 | 0.43 | 0.23 |
| L390J/X56J | 0.22 | 0.45 | 1.40–1.70 | 0.025 | 0.015 | 0.10–0.40 | 0.05 |
| Grade | Minimum Yield Strength, MPa | Tensile Strength, MPa | Minimum Elongation, % |
|---|---|---|---|
| L245J/BJ | 245 | 415–760 | 22 |
| L290J/X42J | 290 | 415–760 | 20 |
| L320J/X46J | 320 | 435–760 | 18 |
| L360J/X52J | 360 | 460–760 | 16 |
| L390J/X56J | 390 | 490–760 | 14 |
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
