Plate Flange/PL Flange hot sales

Plate flanges are commonly used in applications where the mating flange or
flanged fitting is made from a casting. JSFITTINGS offers plate flanges
according to ASME/ANSI B16.5 and GOST,EN1092 standards, in both carbon steel
and stainless steel.
What are Plate flanges?

A Plate Flange is a type of flange that is made from a flat piece of metal,
typically steel or stainless steel. The flange is cut and formed to shape, with
a raised face on one side and a recessed area on the other side. It is often
referred to as a flat flange, a plain flange, and flange slip, etc. Two plate
flanges can be bolted together with a gasket in between them, usually used in
fuel and water pipelines.

Plate flanges have a serrated finish on the inner mating surface, allowing the
plate to fit within the material of the gasket. In any given dimension, plate
flange designs are standardized regardless of the materials used to manufacture
them.

What are the plate flange Advantages?
Plate flanges have several advantages, such as:

Easy to Manufacture: Plate flanges can be easily manufactured by cutting and
shaping a flat plate.

Cost-Effective: Plate flanges are relatively inexpensive compared to other
types of flanges, making them a cost-effective option.

Customizable: Plate flanges can be customized to suit specific application
needs, such as different pressure ratings and sizes.

ASME ANSI B16.5 Plate Flange

Plate flanges Application:
Plate flanges have several uses, such as:

Piping Systems: Plate flanges are commonly used in piping systems to connect
pipes and other fittings.

Industrial Applications: Plate flanges are used in various industrial
applications, such as oil and gas, chemical, and power plants.

High-pressure and High-temperature Applications: Plate flanges are suitable for
use in high-pressure and high-temperature environments because of their
strength and durability.

Why choose JSFITTINGS as your industrial flange supplier?
1. 30,000-ton production capacity guarantee Stable supply of large-scale
project needs

2. Dual-standard certified steel pipes API 5L + EN 10219 dual compliance
assurance

3. Precision Cutting Services Ready-to-use pipe end treatments

4. Oil and Gas Project Logistics System Exclusive Shipping Solutions Covering
Central Asia/Middle East
1.1 Dimensional Tolerance Checks (Per ASTM A530 / API 5L)

Parameter Tolerance Instrument Used

Outer Diameter (OD) ±1% of nominal OD (or ±0.79mm) Pi tape / Laser micrometer

Wall Thickness (WT) ±12.5% (SCH40 and below) Ultrasonic thickness gauge (UTG)

Length ±3mm for random, ±6mm for cut-length Calibrated tape measure

Straightness ≤0.2% of total length Optical comparator

Bevel Angle (for welding) 30°–35° (±5°) Bevel protractor

1.2 Visual & Surface Inspection

Defect Identification:

Lamination – Check for delamination near pipe ends

Scratches/Dents – Max 5% of WT depth allowed (per ASME B31.3)

Rust & Mill Scale – Controlled by SSPC-SP6 (Commercial Blast Cleaning)

Method:

White light inspection (10,000 lux minimum)

Dye penetrant test (PT) for surface cracks

2. Mechanical & Chemical Testing.
2.1 Chemical Composition (Per ASTM A751)

Spark OES Analyzer (for C, Mn, Si, P, S, Cr, Mo, etc.)

LECO Gas Analyzer (for O₂, N₂, H₂ in high-purity applications)

Sampling: Drill chips from mid-wall section (avoiding decarburization)

2.2 Mechanical Properties

Test Standard Equipment Acceptance Criteria

Tensile Test ASTM A370 Universal testing machine ≥415 MPa (A106 Gr.B)

Hardness Test ASTM E10/E18 Rockwell/Brinell tester ≤187 HB (A106 Gr.B)

Impact Test (Charpy V) ASTM A370 Pendulum impact tester ≥27J @ -20°C (API 5L
X42)

Flattening Test ASTM A53 Hydraulic press No cracking @ ⅔ WT flattening

Drift Expanding Test API 5L Mandrel expansion tool No cracks @ 8% expansion

(Note: A106 requires extra tensile tests at elevated temps for high-temp
service)

3. Non-Destructive Testing (NDT)
3.1 Ultrasonic Testing (UT)

Method: Automated rotating UT probes (ASTM E213)

Detection Capability:

Laminations: ≥5% of WT

Inclusions: ≥2mm diameter

Scanner Type: Immersion tank UT for full-body coverage

3.2 Radiographic Testing (RT)

Standard: ASTM E94 (Film/Digital RT)

Sensitivity: Detect 2% WT lack of fusion in welds

Application:

Mandatory for ERW weld seams (API 5L)

10% random sampling for seamless pipes

3.3 Eddy Current Testing (ECT)

Used for surface crack detection in thin-walled pipes (SCH10 and below)

Advantage: No couplant, fast scanning speed (30m/min)

3.4 Hydrostatic Test

Pressure: Minimum 1.5x design pressure (ASME B31.3)

Duration: ≥10 sec (ASTM A106)

Leak Criteria: Zero visual weeping

4. Specialized Tests for Critical Applications
4.1 Corrosion Testing

Salt Spray Test (ASTM B117): 720h exposure for coastal projects

HIC Test (NACE TM0284): Hydrogen-induced cracking resistance for sour service

SSC Test (NACE TM0177): Sulfide stress cracking evaluation

4.2 High-Temperature Performance

Creep Rupture Test (ASTM E139): 10,000h data available for A106 Gr.B

Cyclic Oxidation Test: Weight loss measurement at 600°C

Minimum Order: 100 sets

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