Threaded Flange
Application Scenarios:
● Explosion-proof gas transmission pipelines for gas stations and LPG filling stations;
● Small instrument pipelines and medium sampling lines in chemical explosion-proof workshops;
● Matching connections for galvanized fire protection steel pipes, small air compressors and hydraulic instruments;
● Areas where hot work is strictly prohibited, such as flammable and explosive warehouses and small hazardous chemical transport pipelines.
● Explosion-proof gas transmission pipelines for gas stations and LPG filling stations;
● Small instrument pipelines and medium sampling lines in chemical explosion-proof workshops;
● Matching connections for galvanized fire protection steel pipes, small air compressors and hydraulic instruments;
● Areas where hot work is strictly prohibited, such as flammable and explosive warehouses and small hazardous chemical transport pipelines.
Product Model
Description
- 产品描述
-
Product Overview
The inner bore of the flange is machined with NPT/BSPT tapered sealing threads, which can be directly tightened and assembled with steel pipes with external threads. No welding or hot work is required throughout the process.
Core Technical Parameter Table
Parameter Item Parameter Value Abbreviation TH Full Product Name Threaded 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、FF、MFM、TG PN Pressure Rating (GB Standard) PN06、PN10、PN16、PN25、PN40 PN63 PN100 Class Pressure Rating (ASME Standard) Class 150、300、600、900、1500 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/T20620-2009 (Th)
Class150(PN20)
（mm）
Nominal Dimension Outside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub
NFlange Height
HPipe Thread Size Rc or NPT (inch) Theoretical Weight
KgDN NPS Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)15 ½ 21.3 90 88.9 60.3 16 15.7 4 9.6 30 14 ½ 0.39 20 3/4 26.9 100 98.6 69.9 16 15.7 4 11.2 38 14 3/4 0.56 25 1 33.7 110 108 79.4 16 15.7 4 12.7 49 16 1 0.78 32 1¼ 42.4 115 117.3 88.9 16 15.7 4 14.3 59 19 1¼ 1.03 40 1½ 48.3 125 127 98.4 16 15.7 4 15.9 65 21 1½ 1.32 50 2 60.3 150 152.4 120.7 18 19.1 4 17.5 78 24 2 2.06 65 2½ 76.1 180 177.8 139.7 18 19.1 4 20.7 90 27 2½ 3.28 80 3 88.9 190 190.5 152.4 18 19.1 4 22.3 108 29 3 3.85 100 4 114.3 230 228.6 190.5 18 19.1 8 22.3 135 32 4 5.3 125 5 139.7 255 254 215.9 22 22.4 8 22.3 164 35 5 6.07 150 6 168.3 280 279.4 241.3 22 22.4 8 23.9 192 38 6 7.45 Class300(PN50)
（mm）
Nominal Dimension Outside Diameter
AConnection Dimension Number of Bolt Holes
n(pcs)Flange Thickness
CFlange Hub
NFlange Height
HMinimum Thread Length
HThread Locating Diameter
VPipe Thread Size Rc or NPT (inch) Theoretical Weight
KgDN NPS Flange Outside Diameter
DBolt Circle Diameter
KBolt Hole Diameter
L15 1/2 21.3 95 88.9 66.7 16 15.7 4 12.7 38 21 16 23.6 1/2 0.64 20 3/4 26.9 115 98.6 82.6 18 15.7 4 14.3 48 24 16 29.0 3/4 1.12 25 1 33.7 125 108 88.9 18 15.7 4 15.9 54 25 18 35.8 1 1.36 32 1 1/4 42.4 135 117.3 98.4 18 15.7 4 17.5 64 25 21 44.4 1 1/4 1.68 40 1 1/2 48.3 155 127 114.3 22 15.7 4 19.1 70 29 23 50.3 1 1/2 2.49 50 2 60.3 165 152.4 127.0 18 19.1 8 20.7 84 32 29 63.5 2 2.87 65 2 1/2 76.1 190 177.8 149.2 22 19.1 8 23.9 100 37 32 76.2 2 1/2 4.32 80 3 88.9 210 190.5 168.3 22 19.1 8 27.0 117 41 32 92.2 3 5.85 100 4 114.3 255 228.6 200.0 22 19.1 8 30.2 146 46 37 117.6 4 9.61 125 5 139.7 280 254 235.0 22 22.4 8 33.4 178 49 43 144.4 5 12.3 150 6 168.3 320 279.4 269.9 22 22.4 12 35.0 206 51 47 171.4 6 15.6 ● HG/T 20598-2009 (Th)
PN6
（mm）
Nominal Dimension
DNOutside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub Flange Height
HPipe Thread Size Rc, Rp or NPT (in) Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThN R 10 17.2 75 50 11 4 M10 12 25 4 20 3/8 15 21.3 80 55 11 4 M10 12 30 4 20 1/2 20 26.9 90 65 11 4 M10 14 40 4 24 3/4 25 33.7 100 75 11 4 M10 14 50 4 24 1 32 42.4 120 90 14 4 M12 14 60 6 26 1 1/4 40 48.3 130 100 14 4 M12 14 70 6 26 1 1/2 50 60.3 140 110 14 4 M12 14 80 6 28 2 65 76.1 160 130 14 4 M12 14 100 6 32 2 1/2 80 88.9 190 150 18 4 M16 16 110 8 34 3 100 114.3 210 170 18 4 M16 16 130 8 40 4 125 169.7 240 200 18 8 M16 18 160 8 44 5 150 168.3 265 225 18 8 M16 18 185 10 44 6 PN10
（mm）
Nominal Dimension
DNOutside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub Flange Height
HPipe Thread Size Rc, Rp or NPT (in) Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThN R 10 17.2 90 60 14 4 M12 16 30 4 22 3/8 15 21.3 95 65 14 4 M12 16 35 4 22 1/2 20 26.9 105 75 14 4 M12 18 45 4 26 3/4 25 33.7 115 85 14 4 M12 18 52 4 28 1 32 42.4 140 100 18 4 M16 18 60 6 30 1 1/4 40 48.3 150 110 18 4 M16 18 70 6 32 1 1/2 50 60.3 165 125 18 4 M16 18 84 6 28 2 65 76.1 185 145 18 8 M16 18 104 6 32 2 1/2 80 88.9 200 160 18 8 M16 20 118 6 34 3 100 114.3 220 180 18 8 M16 20 140 8 40 4 125 169.7 250 210 18 8 M16 22 168 8 44 5 150 168.3 285 240 22 8 M20 22 195 10 44 6 PN16
（mm）
Nominal Dimension
DNOutside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub Flange Height
HPipe Thread Size Rc, Rp or NPT (in) Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThN R 10 17.2 90 60 14 4 M12 16 30 4 22 3/8 15 21.3 95 65 14 4 M12 16 35 4 22 1/2 20 26.9 105 75 14 4 M12 18 45 4 26 3/4 25 33.7 115 85 14 4 M12 18 52 4 28 1 32 42.4 140 100 18 4 M16 18 60 6 30 1 1/4 40 48.3 150 110 18 4 M16 18 70 6 32 1 1/2 50 60.3 165 125 18 4 M16 18 84 5 28 2 65 76.1 185 145 18 8 M16 18 104 6 32 2 1/2 80 88.9 200 160 18 8 M16 20 118 6 34 3 100 114.3 220 180 18 8 M16 20 140 8 40 4 125 169.7 250 210 18 8 M16 22 168 8 44 5 150 168.3 285 240 22 8 M20 22 195 10 44 6 PN25
（mm）
Nominal Dimension
DNOutside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub Flange Height
HPipe Thread Size Rc, Rp or NPT (in) Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThN R 10 17.2 90 60 14 4 M12 16 30 4 22 3/8 15 21.3 95 65 14 4 M12 16 35 4 22 1/2 20 26.9 105 75 14 4 M12 18 45 4 26 3/4 25 33.7 115 85 14 4 M12 18 52 4 28 1 32 42.4 140 100 18 4 M16 18 60 6 30 1 1/4 40 48.3 150 110 18 4 M16 18 70 6 32 1 1/2 50 60.3 165 125 18 4 M16 20 84 6 34 2 65 76.1 185 145 18 8 M16 22 104 6 38 2 1/2 80 88.9 200 160 18 8 M16 24 118 8 40 3 100 114.3 235 190 22 8 M20 24 145 8 44 4 125 169.7 270 220 26 8 M24 26 170 8 48 5 150 168.3 300 250 26 8 M24 28 200 10 52 6 PN40
（mm）
Nominal Dimension
DNOutside Diameter
AFlange Outside Diameter
DConnection Dimension Flange Thickness
CFlange Hub Flange Height
HPipe Thread Size Rc, Rp or NPT (in) Bolt Circle Diameter
KBolt Hole Diameter
LNumber of Bolt Holes
n(pcs)Bolt
ThN R 10 17.2 90 60 14 4 M12 16 30 4 22 3/8 15 21.3 95 65 14 4 M12 16 35 4 22 1/2 20 26.9 105 75 14 4 M12 18 45 4 26 3/4 25 33.7 115 85 14 4 M12 18 52 4 28 1 32 42.4 140 100 18 4 M16 18 60 6 30 1 1/4 40 48.3 150 110 18 4 M16 18 70 6 32 1 1/2 50 60.3 165 125 18 4 M16 20 84 6 34 2 65 76.1 185 145 18 8 M16 22 104 6 38 2 1/2 80 88.9 200 160 18 8 M16 24 118 8 40 3 100 114.3 235 190 22 8 M20 24 145 8 44 4 125 169.7 270 220 26 8 M24 26 170 8 48 5 150 168.3 300 250 26 8 M24 28 200 10 52 6 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
Threaded Flange
Application Scenarios:
● Explosion-proof gas transmission pipelines for gas stations and LPG filling stations;
● Small instrument pipelines and medium sampling lines in chemical explosion-proof workshops;
● Matching connections for galvanized fire protection steel pipes, small air compressors and hydraulic instruments;
● Areas where hot work is strictly prohibited, such as flammable and explosive warehouses and small hazardous chemical transport pipelines.
● Explosion-proof gas transmission pipelines for gas stations and LPG filling stations;
● Small instrument pipelines and medium sampling lines in chemical explosion-proof workshops;
● Matching connections for galvanized fire protection steel pipes, small air compressors and hydraulic instruments;
● Areas where hot work is strictly prohibited, such as flammable and explosive warehouses and small hazardous chemical transport pipelines.
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.