Petrol ve gaz gibi endüstrilerdeki boru sistemleri, kimyasal işleme, su arıtma, ve enerji üretimi güçlü gerektirir, sızdırmaz, ve çıkarılabilir bağlantılar. One of the most widely used connection methods is flanging a pipe—a process that involves attaching a flange to the end of a pipe so it can be bolted to another pipe or fitting.

This comprehensive guide explains how to flange a pipe, including the tools, teknikleri, malzemeler, and safety considerations involved. Whether you’re a plant maintenance engineer, pipefitting technician, or procurement professional, understanding the correct flanging procedure ensures reliable performance, emniyet, ve uluslararası standartlara uygunluk.

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What Is Pipe Flanging?

Pipe flanging refers to the process of connecting a flange to the end of a pipe. The flange acts as a structural component that allows for easy assembly and disassembly of piping systems. Flanged joints provide:

• Sızdırmaz sızdırmazlık

• High-pressure and high-temperature resistance

• Kolay bakım ve değiştirme

• Versatile connection to valves, pompalar, or equipment

Flanges can be welded, dişli, or lap-jointed to pipes, depending on the application and material type.

Sasaflance offers a complete range of industrial flanges in carbon steel, paslanmaz çelik, and alloy steel with global delivery and certification.

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Types of Pipe Flanges

Before beginning the flanging process, it’s important to choose the right type of flange:

• Kaynak Boyunlu Flanş (WN): Yüksek basınçlı sistemler için; requires butt-weld connection

• Geçmeli Flanş (BU YÜZDEN): Slips over the pipe and fillet welded

• Soket Kaynak Flanşı (GB): For small-diameter pipes; socket fit with fillet weld

• Dişli Flanş (TH): For low-pressure systems without welding

• Tur eklem flanşı (LJ): Used with stub ends for systems requiring frequent dismantling

• Kör Flanş (BL): Used to block off pipe ends or vessel openings

The choice of flange type depends on pressure class, piping material, servis ortamı, ve bakım ihtiyaçları.

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Materials and Tools Required

Malzemeler:

• Pipe and matching flange (same material and schedule)

• Conta (sarmal yara, lastik, PTFE, graphite, vesaire.)

• Cıvata ve somunlar (according to ASME B16.5 veya TR 1092-1 standart)

• Sealant or anti-seize compound (if required)

Tools:

• Pipe cutter or saw

• Beveling machine or grinder (for weld neck flanges)

• Welding machine (TIG/MIG/SMAW)

• Tork anahtarı

• Flange alignment tool

• Measuring tools (caliper, level, square)

• Personal protective equipment (KKD)

Sasaflance provides flange sets with compatible gaskets and fasteners to simplify the installation process.

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Boru Flanşı Nasıl Yapılır: Step-by-Step Process

1. Preparation and Safety

• Wear PPE: eldivenler, gözlük, güvenlik ayakkabıları, and helmet

• Clean pipe ends and flanges to remove debris, yağ, or rust

• Inspect flange surface and pipe for flatness, roundness, and cracks

• Check material specifications and dimensions

Safety first: Ensure the work area is well-ventilated and free from flammable materials if welding is involved.

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2. Cutting the Pipe to Length

• Use a pipe cutter or band saw to cut the pipe to the required length

• Ensure the cut is straight and square to allow proper flange alignment

• Deburr the edges using a file or grinder

Accurate cutting helps achieve correct gasket face alignment and prevents leaks.

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3. Beveling the Pipe (If Using Weld Neck Flange)

• Bevel the pipe end at a 37.5° angle for butt welding

• The bevel allows for full penetration welds and strong joint integrity

• Clean the bevel area with a wire brush or cloth

Use a beveling machine for consistent results on large-diameter pipes.

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4. Aligning the Flange

• Slide the flange onto the pipe end

• Bindirme bağlantı flanşları için, ensure a stub end is used

• Use a flange alignment tool or level to align bolt holes with mating flange or template

• Ensure the gasket face is square and centered

Proper alignment avoids bolt hole mismatch and uneven gasket compression.

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5. Welding the Flange (If Required)

İçin kaynak boynu veya geçmeli flanşlar:

• Tack weld in three points to hold alignment

• Perform root pass followed by fill and cap passes

• Use appropriate welding procedures (WPS) and electrodes

Post-weld inspection should include:

• Görsel inceleme

• Boya penetrant testi (for critical services)

• Radiographic or ultrasonic testing if required

Sasaflance flanges can be delivered with beveled or custom-machined ends to match client welding procedures.

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6. Conta Montajı

• Choose the correct gasket based on pressure, sıcaklık, ve medya

• Place the gasket between the two flange faces

• Ensure it is centered and undamaged

• Avoid over-handling the gasket before installation

Gasket selection is critical—Sasaflance can recommend compatible gasket types for different flange materials.

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7. Bolting the Flange

• Insert bolts through aligned bolt holes

• Use a star pattern to tighten bolts incrementally

• Apply torque in 3 aşamalar: 30%, 60%, Ve 100% of the target torque

• Use a calibrated torque wrench for accurate loading

Uneven or over-tightening may damage the gasket and lead to leaks.

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8. Basınç Testi ve Muayenesi

Montajdan sonra:

• Yönetmek hidrostatik test to verify leak-tightness

• Inspect for visible leaks, flange rotation, or bolt loosening

• Record pressure and hold time based on project specification

Any leak or pressure drop must be investigated and corrected before commissioning.

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Flanging Best Practices

• Use compatible materials: Ensure pipe, flanş, cıvatalar, and gasket match in strength and corrosion resistance

• Always use a torque wrench: Manual tightening can lead to uneven load

• Avoid reusing gaskets: Always use a new gasket for proper sealing

• Store flanges properly: Protect machined faces from damage and corrosion

• Label and document: Track heat numbers and certificates for quality control

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Kaçınılması Gereken Yaygın Hatalar

• Misalignment of flanges leading to leakage

• Incorrect flange type selection

• Overheating during welding causing flange distortion

• Using wrong bolt torque or tightening sequence

• Neglecting NDT or pressure test after installation

Gibi güvenilir tedarikçilerle ortaklık kurmak Sasaflance helps avoid these issues with precision-manufactured flanges and expert support.

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Applications of Flanged Piping

• Yağ & Gaz: Flowlines, rafineriler, açık deniz sondaj kuleleri

• Petrochemical Plants: Reaktörler, boru hatları, depolama tankları

• Güç Üretimi: Steam systems, kondansatörler, soğutma kuleleri

• Su Arıtma: Intake and discharge lines

• Yiyecek & İçecek: Hygienic piping systems (using stainless flanges)

Every application demands flanges with specific pressure ratings, yüzey bitirmeleri, ve malzeme özellikleri.

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Why Choose sasaflange?

Sasaflance is a global manufacturer of high-performance forged flanges. Advantages include:

• Full range of flanges: ASME, EN, JIS, DIN, GOST

• Malzemeler: Paslanmaz çelik, alaşımlı çelik, karbon çeliği, nikel alaşımları

• Boyutlar: DN15 to DN2000 (1/2″ to 80″)

• Basınç sınıfları: 150# ile 2500#

• Hizmet: İşleme, sondaj, yüzey kalitesi, basınç testi

• Sertifikasyon: EN10204 3.1, 3.2, PED, ISO 9001, CE

From standard deliveries to nuclear and offshore projects, Sasaflance ensures quality and reliability in every flange.

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Çözüm

Flanging a pipe is a critical procedure in any piping system, and doing it correctly ensures leak-free performance, emniyet, ve uzun servis ömrü. By following the proper preparation, hizalama, kaynak, gasket installation, and bolting methods, you can achieve high-quality flanged joints for any industrial application.

With high-precision flanges, expert advice, and full compliance with global standards, Sasaflance is your trusted partner in flanged piping solutions.