F304L Raised Face (RF) DN15 Welded Ring Loose Flange Stainless Steel 150#300#600# HG/T20621

Pressure Ratings:
150 lbs
300 lbs
600 lbs
NPS:
1/2 "
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2 "
3"
4"
5"
6"
8"
10"
12"
14"
16"
18"
20"
24"
Material::
304
304L
316
316L
Quantity:
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HG/T20621 Welded Ring Loose Flange
Standard: HG/T20621
Material Standard: ASME A182
Manufacturing Facility Standard: ISO 9001:2015 , GB/T19001-2016
Certification: Material Test Reports (MTRS) and Certificates of Conformity (COC) are available upon request.

Product Overview

SUS F304 50A Lapped Joint (LJ)Flange Stainless Steel JIS B2220

The SUS F304 50A Lapped Joint (LJ)Flange Stainless Steel JIS B2220 is a high-quality industrial piping component manufactured to meet stringent international standards. Designed for critical applications across various industries, this flange offers exceptional performance, reliability, and longevity.

Our stainless steel flanges are precision-engineered using advanced manufacturing techniques and premium-grade materials. Each flange undergoes rigorous quality control and testing to ensure compliance with dimensional tolerances and pressure ratings specified by international standards.


This innovative loose ring flange provides exceptional flexibility and cost-efficiency for industrial piping systems. The practical loose flange with stub end design allows for easy assembly and disassembly, particularly in systems requiring frequent maintenance. Manufactured from corrosion-resistant F304L stainless steel according to HG/T20621 standards, this durable loose ring flange delivers reliable performance across 150# to 600# pressure ratings. The raised face configuration of this loose flange with stub end ensures optimal gasket compression and leak-proof sealing. Ideal for chemical processing, food industry, and piping applications, this versatile loose ring flange offers significant savings where alignment adjustments and economical solutions are essential requirements. The unique loose flange with stub end design simplifies installation while maintaining full pressure containment capabilities.

Key Features

  • Premium Quality Materials: Manufactured from certified stainless steel grades ensuring excellent corrosion resistance and durability
  • Precision Engineering: CNC machined to exact specifications with tight tolerances meeting international standards
  • Comprehensive Size Range: Available in multiple sizes and pressure ratings to suit various piping applications
  • Industry Compliance: Fully compliant with ASME, EN, DIN, JIS, and other international standards
  • Versatile Applications: Suitable for oil & gas, chemical processing, power generation, water treatment, and other industrial applications
  • Quality Assurance: 100% inspection and testing with comprehensive documentation and traceability
  • Customization Available: Custom manufacturing services available for special requirements and non-standard dimensions
  • Global Supply: Worldwide shipping with experienced logistics support ensuring safe and timely delivery

Dimensions & Sizes

loose ring flange

DN

NPS

A

D

K

L

L

n

C

B

N

H

R1

H

D

Kg

15

1/2

21.3

90

88.9

60.3

16

15.7

4

11.2

22.9

30

16

3

51

34.9

0.38

20

3/4

26.9

100

98.6

69.9

16

15.7

4

12.7

28.2

38

16

3

51

42.9

0.55

25

1

33.7

110

108

79.4

16

15.7

4

14.3

34.9

49

17

3

51

50.8

0.76

32

1-1/4

42.4

115

117.3

88.9

16

15.7

4

15.9

43.7

59

21

5

51

63.5

1.01

40

1-1/2

48.3

125

127

98.4

16

15.7

4

17.5

50.0

65

22

6

51

73.0

1.3

50

2

60.3

150

152.4

120.7

18

19.1

4

19.1

62.5

78

25

8

64

92.1

2.03

65

2-1/2

76.1

180

177.8

139.7

18

19.1

4

22.3

78.5/75.4

90

29

8

64

104.8

3.25

80

3

88.9

190

190.5

152.4

18

19.1

4

23.9

91.4

108

30

10

64

127.0

3.81

100

4

114.3

230

228.6

190.5

18

19.1

8

23.9

116.8

135

33

11

76

157.2

5.25

125

5

139.7

255

254

215.9

22

22.4

8

23.9

144.4

164

36

11

76

185.7

6.02

150

6

168.3

280

278.4

241.3

22

22.4

8

25.4

171.4

192

40

13

89

215.9

7.4

200

8

219.1

345

342.9

298.58

22

22.4

8

28.6

222.2

246

44

13

102

269.9

12.1

250

10

273

405

406.4

362.0

26

25.4

12

30.2

277.4

305

49

13

127

323.8

16.4

300

12

323.9

485

482.6

431.8

26

25.4

12

31.8

328.2

365

56

13

152

381.0

26.1

350

14

355.6

535

533.4

476.2

30

28.4

12

35.0

360.2

400

79

13

152

412.8

34.5

400

16

406.4

595

596.9

539.8

30

28.4

16

36.6

411.2

457

87

13

152

469.9

44.6

450

18

457

635

635

577.9

33

31.75

16

39.7

462.3

505

97

13

152

533.4

48.7

500

20

508

700

698.5

635.0

33

31.75

20

42.9

514.4

559

103

13

152

584.2

61.6

600

24

610

815

812.8

749.3

36

35.1

20

47.7

616.0

663

111

13

152

692.2

86.6

Class150(PN20)  (mm)     S1≥0.875S

This flange is available in a comprehensive range of sizes and pressure ratings to accommodate diverse piping system requirements. Our manufacturing capabilities allow us to produce both standard and custom dimensions.

Available Sizes: Wide range from small bore to large diameter

Pressure Ratings: Multiple pressure classes available (Class 150, 300, 600, 900, 1500, 2500, and PN ratings)

Connection Types: Suitable for welding, threading, or slip-on connections depending on flange type

For detailed dimension tables and technical drawings, please contact our technical support team. We can provide comprehensive dimensional specifications according to your required standard (ASME, EN, DIN, JIS, etc.).

Applications

This flange is ideal for use in:

  • Oil & Gas Industry: Upstream, midstream, and downstream applications
  • Chemical & Petrochemical: Process piping, reactors, and storage systems
  • Power Generation: Conventional and renewable energy facilities
  • Water Treatment: Municipal and industrial water systems
  • Pharmaceutical: Sanitary process applications
  • Food & Beverage: Hygienic piping systems
  • Marine & Offshore: Shipbuilding and offshore platforms
  • General Industry: Manufacturing, HVAC, and building services

Quality Assurance

We maintain the highest standards of quality control throughout the manufacturing process:

  • ISO 9001:2015 certified manufacturing facility
  • 100% material traceability with heat number tracking
  • Comprehensive testing including chemical analysis, mechanical testing, and non-destructive examination
  • Third-party inspection available (TPI, LPI, SGS, BV, etc.)
  • Complete documentation package including MTC 3.1, test certificates, and dimension reports

FAQ

1. What materials are used for SUS F304 50A Lapped Joint?

Our SUS F304 50A Lapped Joint is manufactured from high-quality stainless steel grades including F304, F304L, F316, F316L, and other equivalent materials according to international standards. Material certificates are provided with each order.

2. What standards does this flange comply with?

This flange is manufactured in compliance with major international standards including ASME B16.5, ASME B16.47, EN 1092-1, DIN standards, JIS B2220, and HG/T standards. We can provide third-party inspection certificates upon request.

3. What is the delivery time?

Standard sizes are typically available from stock with 3-7 days delivery. Custom orders require 15-30 days depending on specifications and quantity. Rush orders can be accommodated with additional coordination.

4. Can you provide custom dimensions?

Yes, we offer custom manufacturing services. We can produce flanges according to your specific drawings and requirements. Our engineering team can also assist with design optimization.

5. What quality certifications do you provide?

We provide comprehensive documentation including Material Test Certificates (MTC), Third-Party Inspection Reports (TPI), Dimension Reports, and Pressure Test Certificates. All products comply with international quality standards.

Why Choose Our Flanges?

With decades of experience in manufacturing industrial piping components, we have established ourselves as a trusted supplier of high-quality flanges worldwide. Our commitment to excellence is reflected in:

  • Technical Expertise: Experienced engineering team providing technical support and custom solutions
  • Manufacturing Excellence: State-of-the-art facilities with advanced CNC machining and testing equipment
  • Quality Focus: Rigorous quality control at every stage from raw material to finished product
  • Customer Service: Responsive support team ensuring smooth order processing and after-sales service
  • Competitive Pricing: Direct manufacturer pricing with no intermediary markups
  • On-Time Delivery: Efficient production planning and reliable logistics partnerships

CONTACT US

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