Socket Weld Flange
Application Scenarios:
● Supporting pipelines for petrochemical instruments, pressure gauges, sensors and small medium sampling lines;
● Small-bore pipelines for steam and hydraulic oil transportation in power plants and chemical plants;
● Small process pipelines in explosion-proof workshops where threaded connections are not applicable and large-bore butt welding is unnecessary.
● Supporting pipelines for petrochemical instruments, pressure gauges, sensors and small medium sampling lines;
● Small-bore pipelines for steam and hydraulic oil transportation in power plants and chemical plants;
● Small process pipelines in explosion-proof workshops where threaded connections are not applicable and large-bore butt welding is unnecessary.
Product Model
Description
- 产品描述
-
Product Overview
The pipe is inserted into the built-in socket of the flange, with only one circle of fillet weld applied at the top of the pipe end for sealing; the pipe does not run through the flange body.
Core Technical Parameter Table
Parameter Item Parameter Value Abbreviation SW Full Product Name Socket Weld Flange GB Standard Materials Carbon Steel:20#
Alloy Steel:16Mn、20MnMo、15CrMo、12Cr1MoV、14Cr1Mo、12Cr2Mo1、12Cr2Mo1V、12Cr5Mo、10Cr9Mo1VNbN、30CrMo、35CrMo
Low Temperature Steel:16MnD、20MnMoD、09MnNiD
Austenitic Stainless Steel:S30408 (304)、S30403 (304L)、S30409 (304H)、S32168 (321)、S32169 (321H) 、S34778 (347)、S34779 (347H) 、S31608 (316) 、S31603 (316L) 、S31609 (316H)
Duplex Stainless Steel:S22053 (2205)ASTM & ASME Materials Carbon Steel:A105
Low Temperature Carbon Steel (A350):LF2、LF3、LF6
Line Pipe Steel (A694):F52、F60、F65、 F70
Low Alloy Steel (A182):F5、F5a、F9、F91、F92、F11 (Cl.1/2/3)、F22 (Cl.1/3)
Austenitic Stainless Steel (A182):F304、F304L、F304H、F316、F316L、F316H、F321、F321H、F347、F347H
Duplex Stainless Steel (A182):F51 (2205)、F60 (S32205)Sealing Face Type RF、MFM、TG、RTJ PN Pressure Rating (GB Standard) PN06、PN10、PN16、PN25、PN40、PN63、PN100 Class Pressure Rating (ASME Standard) Class 150、300、600、900、1500 Nominal Size DN10-80 Certifications API/ISO/CE Payment Terms L/C, D/P, T/T Delivery Lead Time 10-30 day Production Capacity 5000TONS/MONTH Applicable Standard The company manufactures flange products complying with international and domestic standards including ANSI B16.5, ASME B16.47/16.48, DIN EN 1092-1/2, JIS B2220, GOST 12821-80, GB/T 9124.1, SH/T 3406, SH/T 3426, SH/T 3425, HG/T 20615 and HG/T 20592. Product Parameters
● HG/T20619-2009(SW)
Class150(PN20)
（mm）
Nominal Size Outer Diameter of Steel Pipe
AFlange Outer Diameter
DConnection Dimension Flange Thickness
cFlange Inner Diameter
B1Socket Large End of Flange Neck
NFlange Height
HTheoretical Weight
KgDN NPS Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)B2 U 15 ½ 21.3 90 88.9 60.3 16 15.7 4 9.6 15.5 15.7 22.5 22.4 10 30 14 0.42 20 ¾ 26.9 100 98.6 69.9 16 15.7 4 11.2 21 20.8 27.5 27.7 11 38 14 0.59 25 1 33.7 110 108 79.4 16 15.7 4 12.7 27 26.7 34.5 34.5 13 49 16 0.81 32 1¼ 42.4 115 117.3 88.9 16 15.7 4 14.3 35 35.1 43.5 43.2 14 59 19 1.07 40 1½ 48.3 125 127 98.4 16 15.7 4 15.9 41 40.9 49.5 49.5 16 65 21 1.36 50 2 60.3 150 152.4 120.7 18 19.1 4 17.5 52 52.6 61.5 62 17 78 24 2.1 65 2½ 76.1 180 177.8 139.7 18 19.1 4 20.7 66 62.7 77.6 74.7 19 90 27 3.33 80 3 88.9 190 190.5 152.4 18 19.1 4 22.3 77.5 78 90.5 90.7 21 108 29 3.9 Class300(PN50)
Nominal Size Outer Diameter of Steel Pipe
AFlange Outer Diameter
DConnection Dimension Flange Thickness
cFlange Inner Diameter
B1Socket Large End of Flange Neck
NFlange Height
HTheoretical Weight
KgDN NPS Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)B2 U 15 ½ 21.3 95 88.9 66.7 16 15.7 4 12.7 15.5 15.7 22.5 22.4 10 38 21 0.66 20 ¾ 26.9 115 98.6 82.6 18 15.7 4 14.3 21 20.8 27.5 27.7 11 48 24 1.15 25 1 33.7 125 108 88.9 18 15.7 4 15.9 27 26.7 34.5 34.5 13 54 25 1.4 32 1¼ 42.4 135 117.3 98.4 18 15.7 4 17.5 35 35.1 43.5 43.2 14 64 25 1.75 40 1½ 48.3 155 127 114.3 22 15.7 4 19.1 41 40.9 49.5 49.5 16 70 29 2.55 50 2 60.3 165 152.4 127.0 18 19.1 8 20.7 52 52.6 61.5 62 17 84 32 2.93 65 2½ 76.1 190 177.8 149.2 22 19.1 8 23.9 66 62.7 77.6 74.7 19 100 37 4.4 80 3 88.9 210 190.5 168.3 22 19.1 8 27.0 77.5 78 90.5 90.7 21 117 41 5.92 Class600(PN110)
（mm）
Nominal Size Outer Diameter of Steel Pipe
AFlange Outer Diameter
DConnection Dimension Flange Thickness
cFlange Inner Diameter
B1Socket Large End of Flange Neck
NFlange Height
HTheoretical Weight
KgDN NPS Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)B2 U 15 ½ 21.3 95 88.9 66.7 16 15.7 4 14.3 - 22.5 22.4 10 38 22 0.76 20 ¾ 26.9 115 98.6 82.6 18 15.7 4 15.9 - 27.5 27.7 11 48 25 1.29 25 1 33.7 125 108 88.9 18 15.7 4 17.5 - 34.5 34.5 13 54 27 1.55 32 1¼ 42.4 135 117.3 98.4 18 15.7 4 20.7 - 43.5 43.2 14 64 29 2.06 40 1½ 48.3 155 127 114.3 22 15.7 4 22.3 - 49.5 49.5 16 70 32 3.00 50 2 60.3 165 152.4 127.0 18 19.1 8 25.4 - 61.5 62 17 84 37 3.67 65 2½ 76.1 190 177.8 149.2 22 19.1 8 28.6 - 77.6 74.7 19 100 41 5.35 80 3 88.9 210 190.5 168.3 22 19.1 8 31.8 - 90.5 90.7 21 117 46 7.06 Class900(PN150)/ Class1500(PN260)
Nominal Size Outer Diameter of Steel Pipe
AFlange Outer Diameter
DConnection Dimension Flange Thickness
cFlange Inner Diameter
B1Socket Large End of Flange Neck
NFlange Height
HTheoretical Weight
KgDN NPS Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)B2 U 15 ½ 21.3 120 120.6 82.6 22 22.3 4 22.3 - 22.5 22.4 10 38 32 1.8 15 20 ¾ 26.9 130 130 88.9 22 22.3 4 25.4 - 27.5 27.7 11 44 35 2.41 20 25 1 33.7 150 149.3 101.6 26 25.4 4 28.6 - 34.5 34.5 13 52 41 3.55 25 32 1¼ 42.4 160 158.7 111.1 26 25.4 4 28.6 - 43.5 43.2 14 64 41 4.02 32 40 1½ 48.3 180 177.8 123.8 30 28.4 4 31.8 - 49.5 49.5 16 70 44 5.45 40 50 2 60.3 215 215.9 165.1 26 25.4 8 38.1 - 61.5 62 17 105 57 10.2 50 65 2½ 76.1 245 244.3 190.5 30 28.4 8 41.3 - 77.6 74.7 19 124 64 13.9 65 ● HG/T20597-2009(SW)
PN10
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 90 60 14 4 M12 16 11.5 9 18 15 9 30 4 22 15 21.3 18 95 65 14 4 M12 16 15.5 12 22.5 19 10 35 4 22 20 26.9 25 105 75 14 4 M12 18 21 19 27.5 26 11 45 4 26 25 33.7 32 115 85 14 4 M12 18 27 26 34.5 33 13 52 4 28 32 42.5 38 140 100 18 4 M16 18 35 30 43.5 39 14 60 6 30 40 48.3 45 150 110 18 4 M16 18 41 37 49.5 46 16 70 6 32 50 60.3 57 165 125 18 4 M16 18 52 49 61.5 59 17 84 5 28 PN16
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 90 60 14 4 M12 16 11.5 9 18 15 9 30 4 22 15 21.3 18 95 65 14 4 M12 16 15.5 12 22.5 19 10 35 4 22 20 26.9 25 105 75 14 4 M12 18 21 19 27.5 26 11 45 4 26 25 33.7 32 115 85 14 4 M12 18 27 26 34.5 33 13 52 4 28 32 42.5 38 140 100 18 4 M16 18 35 30 43.5 39 14 60 6 30 40 48.3 45 150 110 18 4 M16 18 41 37 49.5 46 16 70 6 32 50 60.3 57 165 125 18 4 M16 18 52 49 61.5 59 17 84 5 28 PN25
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 90 60 14 4 M12 16 11.5 9 18 15 9 30 4 22 15 21.3 18 95 65 14 4 M12 16 15.5 12 22.5 19 10 35 4 22 20 26.9 25 105 75 14 4 M12 18 21 19 27.5 26 11 45 4 26 25 33.7 32 115 85 14 4 M12 18 27 26 34.5 33 13 52 4 28 32 42.5 38 140 100 18 4 M16 18 35 30 43.5 39 14 60 6 30 40 48.3 45 150 110 18 4 M16 18 41 37 49.5 46 16 70 6 32 50 60.3 57 165 125 18 4 M16 20 52 49 61.5 59 17 84 6 34 PN40
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 90 60 14 4 M12 16 11.5 9 18 15 9 30 4 22 15 21.3 18 95 65 14 4 M12 16 15.5 12 22.5 19 10 35 4 22 20 26.9 25 105 75 14 4 M12 18 21 19 27.5 26 11 45 4 26 25 33.7 32 115 85 14 4 M12 18 27 26 34.5 33 13 52 4 28 32 42.5 38 140 100 18 4 M16 18 35 30 43.5 39 14 60 6 30 40 48.3 45 150 110 18 4 M16 18 41 37 49.5 46 16 70 6 32 50 60.3 57 165 125 18 4 M16 20 52 49 61.5 59 17 84 6 34 PN63
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 100 70 14 4 M12 20 11.5 9 18 15 9 40 4 28 15 21.3 18 105 75 14 4 M12 20 15.5 12 22.5 19 10 43 4 28 20 26.9 25 130 90 18 4 M16 22 21 19 27.5 26 11 52 4 30 25 33.7 32 140 100 18 4 M19 24 27 26 34.5 33 13 60 4 32 32 42.5 38 155 110 22 4 M20 24 35 30 43.5 39 14 68 6 32 40 48.3 45 170 125 22 4 M20 26 41 37 49.5 46 16 80 6 34 50 60.3 57 180 135 22 4 M20 26 52 49 61.5 59 17 90 6 36 PN100
（mm）
Nominal Size Outer Diameter of Steel Pipe
A1Flange Outer Diameter Connection Dimension Flange Thickness Flange Inner Diameter
B1Socket Flange Neck Flange Height
HB2 U N R DN A B D Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThC A B A B 10 17.2 14 100 70 14 4 M12 20 11.5 9 18 15 9 40 4 28 15 21.3 18 105 75 14 4 M12 20 15.5 12 22.5 19 10 43 4 28 20 26.9 25 130 90 18 4 M16 22 21 19 27.5 26 11 52 4 30 25 33.7 32 140 100 18 4 M16 24 27 26 34.5 33 13 60 4 32 32 42.5 38 155 110 22 4 M20 24 35 30 43.5 39 14 68 6 32 40 48.3 45 170 125 22 4 M20 26 41 37 49.5 46 16 80 6 34 50 60.3 57 195 145 26 4 M24 28 52 49 61.5 59 17 95 6 36 Production Process
FAQs
Basic info about your pipe fitting factory, establishment year and location?
Cangzhou Dongjun Pipe was founded in 2000, located in Buzhai Industrial Zone, Mengcun — China’s well-known capital of elbows and pipe fittings. We enjoy convenient transport near Huanghua Port, Beijing and Tianjin. Our annual production capacity reaches 20,000 tons, with 230 employees including 45 professional technical engineers. Factory visits are welcome.
What main pipe fitting products can you provide?
We manufacture high, medium and low pressure steel pipeline components. Main products include flanges, elbows, tees, reducers, socket weld inserts, nozzles and pipe supports. We have more than 1000 specifications covering mainstream pipeline accessories to realize one-stop procurement.
What metal materials are available for your pipe fittings?
We supply carbon steel, alloy steel, stainless steel, duplex steel and nickel-based alloy to fit different temperature, pressure and corrosion environments. If you need special custom metal materials for special working conditions, our technical team can also meet your requirements.
Which international standards do your products comply with?
Our products support GB, ASME, DIN and JIS standards. Every batch of goods can be matched with EN10204:2004 official test reports, which are widely recognized by engineering supervisors in global projects.
How do you control product quality before delivery?
We own over 200 sets of professional production and testing equipment, including full NDT devices, spectrometers and mechanical testing machines. Raw material inspection, semi-finished product testing and finished product full inspection will be completed strictly before shipment to avoid defective goods.
What certifications does your factory hold for project bidding?
We have ISO9001/14001/45001 system certificates, API Spec Q1 10th Edition certificate and China Special Equipment Manufacturing License for pressure pipeline components. All valid certificates can be provided for your tender review at any time.
Qualification
Socket Weld Flange
Application Scenarios:
● Supporting pipelines for petrochemical instruments, pressure gauges, sensors and small medium sampling lines;
● Small-bore pipelines for steam and hydraulic oil transportation in power plants and chemical plants;
● Small process pipelines in explosion-proof workshops where threaded connections are not applicable and large-bore butt welding is unnecessary.
● Supporting pipelines for petrochemical instruments, pressure gauges, sensors and small medium sampling lines;
● Small-bore pipelines for steam and hydraulic oil transportation in power plants and chemical plants;
● Small process pipelines in explosion-proof workshops where threaded connections are not applicable and large-bore butt welding is unnecessary.
OUR SERVICE
We offers a wealth of product support resources, including a range of technical and downloadable product manuals to product certifications.
Our Service Product CatalogCOMPANY STRENGTHS
Experience
26 years of professional pipe fittings production and customization experience, with 45 senior technical engineers to support project development.
OEM/ODM
Full support OEM & ODM customization. We produce carbon/alloy/stainless steel fittings with 1000+ specs complying with GB, ASME, DIN, JIS standards.
Reliable Quality
Strict raw material selection & full-process inspection. Our lab equips complete devices for chemical analysis, mechanical test and NDT.
Certification
Possess full authoritative qualifications: ISO triple system, API Spec Q1, national pressure pipeline manufacturing license, EN10204 test certificates available.
Export
Located in Mengcun pipe fittings hub adjacent to Huanghua Port. Products cover all China provinces and export to Southeast Asia, Middle East, South America and more.
Advanced Equipment & Tech
200+ sets of advanced forging, CNC machining and full inspection equipment, annual output reaches 20,000 tons of high-pressure pipe fittings.