Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of gr.b standard for submerged arc welding pipe in China. Welcome to buy discount gr.b standard for submerged arc welding pipe made in China here from our factory. Quality products and low price are available.
Product introduction
Longitudinally Submerged Arc Welded (LSAW) steel pipes are a type of steel pipe that is manufactured using the submerged arc welding process. This method involves the use of an electric arc to weld the edges of a steel plate together to form a cylindrical shape. The key feature of LSAW pipes is that the welding process occurs beneath a layer of granular flux, which protects the weld from atmospheric contamination and ensures a high-quality weld.
Engineering technical support:
We provide comprehensive engineering technical support to help customers solve the technical problems encountered in the design, installation and maintenance of submerged arc welded steel pipes. Our team consists of experienced engineers and technicians, who can provide professional suggestions and solutions to ensure the smooth progress of the project and the efficient operation of the steel pipe system.
Long life design:
Our submerged arc welded steel pipe adopts long-life design, and through accurate material selection and strict process control, it ensures that the steel pipe maintains excellent performance in long-term use. Our products are specially treated to resist corrosion and wear, thus prolonging their service life, reducing the frequency of replacement and saving costs for customers.
International certification:
Our products have obtained many international certifications, including ISO, CE, API, etc. These certifications not only prove the high quality and reliability of our products, but also facilitate global trade. These certifications indicate that our products meet international standards and can meet the needs of global customers.
Outer Diameter and Wall Thickness
| NPS | DN | OD | Sch10 | Sch20 | Sch30 | Std | Sch40 | Sch60 | XS | Sch80 | Sch100 | Sch120 | Sch140 | Sch160 | XXS | Sch5s | Sch10s | Sch40s | Sch80s |
| 1/8 | 6 | 10.3 | 1.45 | 1.73 | 1.73 | 2.41 | 2.41 | 1.24 | 1.73 | 2.41 | |||||||||
| 1/4 | 8 | 13.7 | 1.85 | 2.24 | 2.24 | 3.02 | 3.02 | 1.65 | 2.24 | 3.02 | |||||||||
| 3/8 | 10 | 17.1 | 1.85 | 2.31 | 2.31 | 3.20 | 3.20 | 1.65 | 2.31 | 3.20 | |||||||||
| 1/2 | 15 | 21.3 | 2.41 | 2.77 | 2.77 | 3.73 | 3.73 | 4.78 | 7.47 | 1.65 | 2.11 | 2.77 | 3.73 | ||||||
| 3/4 | 20 | 26.7 | 2.41 | 2.87 | 2.87 | 3.91 | 3.91 | 5.56 | 7.82 | 1.65 | 2.11 | 2.87 | 3.91 | ||||||
| 1 | 25 | 33.4 | 2.90 | 3.38 | 3.38 | 4.55 | 4.55 | 6.35 | 9.09 | 1.65 | 2.77 | 3.38 | 4.55 | ||||||
| 1 1/4 | 32 | 42.2 | 2.97 | 3.56 | 3.56 | 4.85 | 4.85 | 6.35 | 9.70 | 1.65 | 2.77 | 3.56 | 4.85 | ||||||
| 1 1/2 | 40 | 48.3 | 3.18 | 3.68 | 3.68 | 5.08 | 5.08 | 7.14 | 10.15 | 1.65 | 2.77 | 3.68 | 5.08 | ||||||
| 2 | 50 | 60.3 | 3.18 | 3.91 | 3.91 | 5.54 | 5.54 | 8.74 | 11.07 | 1.65 | 2.77 | 3.91 | 5.54 | ||||||
| 2 1/2 | 65 | 73 | 4.78 | 5.16 | 5.16 | 7.01 | 7.01 | 9.53 | 14.02 | 2.11 | 3.05 | 5.16 | 7.01 | ||||||
| 3 | 80 | 88.9 | 4.78 | 5.49 | 5.49 | 7.62 | 7.62 | 11.13 | 15.24 | 2.11 | 3.05 | 5.49 | 7.62 | ||||||
| 3 1/2 | 90 | 101.6 | 4.78 | 5.74 | 5.74 | 8.08 | 8.08 | 2.11 | 3.05 | 5.74 | 8.08 | ||||||||
| 4 | 100 | 114.3 | 4.78 | 6.02 | 6.02 | 8.56 | 8.56 | 11.13 | 13.49 | 17.12 | 2.11 | 3.05 | 6.02 | 8.56 | |||||
| 5 | 125 | 141.3 | 6.55 | 6.55 | 9.53 | 9.53 | 12.70 | 15.88 | 19.05 | 2.77 | 3.40 | 6.55 | 9.53 | ||||||
| 6 | 150 | 168.3 | 7.11 | 7.11 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | 2.77 | 3.40 | 7.11 | 10.97 | ||||||
| 8 | 200 | 219.1 | 6.35 | 7.04 | 8.10 | 8.18 | 10.31 | 12.70 | 12.70 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 | 2.77 | 3.76 | 8.18 | 12.70 | |
| 10 | 250 | 273.1 | 6.35 | 7.80 | 9.27 | 9.27 | 12.70 | 12.70 | 15.09 | 18.26 | 21.44 | 25.40 | 28.58 | 25.40 | 3.40 | 4.19 | 9.27 | 12.70 | |
| 12 | 300 | 323.9 | 6.35 | 8.38 | 9.53 | 10.31 | 14.27 | 12.70 | 17.48 | 21.44 | 25.40 | 28.58 | 33.32 | 25.40 | 3.96 | 4.57 | 9.53 | 12.70 | |
| 14 | 350 | 355.6 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 15.09 | 12.70 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | 3.96 | 4.78 | |||
| 16 | 400 | 406.4 | 6.35 | 7.92 | 9.53 | 9.53 | 12.70 | 16.66 | 12.70 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | 4.19 | 4.78 | |||
| 18 | 450 | 457.2 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 19.05 | 12.70 | 23.83 | 29.36 | 34.96 | 39.67 | 45.24 | 4.19 | 4.78 | |||
| 20 | 500 | 508 | 6.35 | 9.53 | 12.70 | 9.53 | 15.09 | 20.62 | 12.70 | 26.19 | 32.54 | 38.10 | 44.45 | 50.01 | 4.78 | 5.54 | |||
| 22 | 550 | 558.8 | 6.35 | 9.53 | 12.70 | 9.53 | 22.23 | 12.70 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | 4.78 | 5.54 | ||||
| 24 | 600 | 609.6 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 24.61 | 12.70 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | 5.54 | 6.35 | |||
| 26 | 650 | 660 | 7.92 | 12.70 | 9.53 | 12.70 | |||||||||||||
| 28 | 700 | 711.2 | 7.92 | 12.70 | 15.88 | 9.53 | 12.70 | ||||||||||||
| 30 | 750 | 762 | 7.92 | 12.70 | 15.88 | 9.53 | 12.70 | ||||||||||||
| 32 | 800 | 812.8 | 7.92 | 12.70 | 15.88 | 9.53 | 17.48 | 12.70 | |||||||||||
| 34 | 850 | 863.6 | 7.92 | 12.70 | 15.88 | 9.53 | 17.48 | 12.70 | |||||||||||
| 36 | 900 | 914.4 | 7.92 | 12.70 | 15.88 | 9.53 | 19.05 | 12.70 | |||||||||||
| 38 | 950 | 965.2 | 9.53 | 12.70 | |||||||||||||||
| 40 | 1000 | 1016 | 9.53 | 12.70 | |||||||||||||||
| 42 | 1050 | 1066.8 | 9.53 | 12.70 | |||||||||||||||
| 44 | 1100 | 1117.6 | 9.53 | 12.70 | |||||||||||||||
| 46 | 1150 | 1168.4 | 9.53 | 12.70 | |||||||||||||||
| 48 | 1200 | 1219 | 9.53 | 12.70 | |||||||||||||||
| 52 | 1300 | 1320.8 | |||||||||||||||||
| 56 | 1400 | 1422.4 | |||||||||||||||||
| kg/meter=(OD-TK)*TK*0.02466 | |||||||||||||||||||
Specifications

LSAW STEEL PIPE production flow

Raw Material Inventory Statistics-Raw Material Incoming Inspection-Raw Material Visual & Dimensional Inspection-End Tab Welding-Plate Ultrasonic Test-End Milling-Rust Removal and Cleaning of Plate-Edge Crimping-Cold Forming-Tack Weld-Weld Inspection and Repair-Internal Wall Dedusting-Inside Welding-Outside Welding-Remove Slag and End Tab & Take macroscopic samples-UT Test before Expansion(Optional items)-R.T test before-Expanding-Mechanical-Expansion-Hydrostatic Testing-Repair of Pipe End Welding-Pipe End Beveling-U.T Test after Expanding-R.T Test after Expanding-Pipe Ends Magnetic Particle Inspection(Optional items)-Dimension Inspection, Weighing, Length Measurement-Pipe End Residual Magnetic Inspection-Marking and Installing Pipe Cap-Storage-Delivery Inspection-Transshipment and Delivery
ERW STEEL PIPE production flow

Material preparation-Uncoiling , Flattening , Shearing and Butt Welding-Loop Storing-Forming system-Welding-Post-weld heat treatment (PWHT)-Air cooling water-Online UT test-Sizing and straightening-Cutting length-On-demand water pressure test-Final product inspection
Certifications

API 2B

API 5L

GOST

ISO 9001

EN 10219

EN 10210
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