블라인드 플랜지 두께를 계산하는 방법?

산업용 배관 시스템, blind flanges play a critical role in sealing off the end of pipelines, 압력 용기, or valves. 하지만, to ensure safety and durability, it is essential to determine the correct flange thickness based on pressure, 온도, 재료, and flange size. 그래서, how to calculate blind flange thickness? 이 기사에서는, SASAFLANGE explains the fundamentals, 업계 표준, and calculation factors involved in this important engineering task.

블라인드 플랜지란?

A blind flange is a solid disk used to close off the end of a piping system. It has bolt holes but no bore (central opening), making it suitable for terminating pipe ends or isolating sections for maintenance, 테스트, 아니면 향후 확장.

The thickness of a blind flange must be sufficient to withstand internal pressure and mechanical stress without deformation or leakage. An undersized flange risks failure, while an oversized one increases cost and weight unnecessarily.

Why Flange Thickness Matters

올바른 선택 블라인드 플랜지 thickness ensures:

Safe containment of system pressure
Long-term durability and fatigue resistance
Compliance with industry standards (ASME, EN, DIN)
Proper alignment with gaskets and mating flanges

~에 SASAFLANGE, all blind flanges are manufactured in accordance with ASME B16.5, EN 1092-1, 또는 DIN 2527 표준, where minimum thickness is clearly defined by pressure class and nominal size.

Standard-Based Thickness Reference

Most engineers and buyers refer to standard tables instead of calculating from scratch. 예를 들어, ASME B16.5 defines blind flange thicknesses for each pressure class (수업 150, 300, 600, 등.) and pipe size (NPS).

NPS (신장)	수업 150 (mm)	수업 300 (mm)	수업 600 (mm)
2″	15.9	19.1	25.4
4″	19.1	25.4	38.1
6″	22.2	30.2	47.6

메모: These thicknesses include the raised face, and assume the use of carbon steel materials.

To check EN or DIN blind flange thicknesses, refer to standards like EN 1092-1 유형 05 또는 DIN 2527. You can also request a technical data sheet from SASAFLANGE to ensure compliance with your required flange type and rating.

Key Factors Affecting Thickness Calculation

If a custom flange is needed, or if you want to verify a flange beyond standard limits, 다음 요소를 고려하십시오:

1. Design Pressure (피)

This is the maximum internal pressure the flange will experience. It must be known or specified in bar, MPa, or psi.

2. 공칭 크기 (NPS 또는 DN)

Larger diameters require thicker flanges due to the increased surface area exposed to pressure.

3. Material Yield Strength (Sy)

Stronger materials like stainless steel 316 or alloy steel can handle more pressure with less thickness.

4. Design Temperature (티)

온도가 상승함에 따라, material strength generally decreases, requiring more thickness.

5. Corrosion Allowance

In aggressive environments, an extra corrosion allowance (천하게 1.5 에게 3 mm) is added.

General Calculation Formula (Based on ASME VIII Div 1)

The blind flange thickness can be roughly estimated using the formula:

h = (P × D²) / (4 × Sy × E × K)

어디:

h = minimum thickness (mm)
피 = design pressure (MPa)
디 = flange diameter (mm)
Sy = allowable material stress at design temperature (MPa)
이자형 = weld joint efficiency (일반적으로 1 for non-welded flanges)
케이 = design factor (대개 1.5 or higher for safety)

중요한: This is a simplified approach and should not replace official pressure vessel calculations governed by ASME or EN codes. Always consult a mechanical engineer or refer to certified design software.

Example Calculation

Let’s say you need a blind flange for a 6-inch carbon steel pipe at 10 bar pressure and 100°C.

P = 1 MPa (10 술집)
D = 152 mm
Sy = 138 MPa (for A105 at 100°C)
E = 1
K = 1.5

Plug into the formula:

h = (1 × 152²) / (4 × 138 × 1 × 1.5)
h ≈ 30 mm

그래서, the blind flange should be at least 30 mm thick for safety.

Alternatively, select a 수업 300 플랜지, which has a standard thickness of 30.2 mm for 6″.

When to Use Custom Flange Thickness

Custom flange designs may be necessary when:

The pressure exceeds standard ASME Class 2500
The pipe system uses non-standard materials
The application involves vibration, 피로, or cyclic loading
Extra corrosion allowance is required
Local regulations mandate specific thickness values

그러한 경우, SASAFLANGE can manufacture blind flanges based on your design drawings or technical requirements, including full dimensional inspection and pressure testing.

결론

이해 how to calculate blind flange thickness helps ensure system safety, 비용 효율성, 국제 표준 준수. For most applications, standard thicknesses defined by ASME, EN, or DIN are sufficient. 하지만, in high-pressure or custom conditions, careful calculation based on material strength and pressure is essential.

For certified blind flanges with accurate thickness and material data, 의지하다 SASAFLANGE. Our engineering team can assist with standard selection or custom designs, providing durable and pressure-rated solutions for all your flange needs.