Name: ASME SA266 Gr.2N Carbon Steel Flange For Petrochemical Equipment
Brand: YUHONG HOLDING GROUP CO., LTD
SKU: Flange For Heat Exchanger
Availability: InStock

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ASME SA266 Gr.2N Carbon Steel Flange For Petrochemical Equipment

Gr.2N Carbon Steel Flange

Petrochemical Equipment Carbon Steel Flange

ASME tube side flange

Place of Origin:

CHINA

Brand Name:

YUHONG

Certification:

ISO 9001-2015

Model Number:

Flange For Heat Exchanger

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Product Details

Srandard:

ASME SA266

Material:

Gr.2N

Flange Type:

WN, SO, BL, SW, THREAD

Flange Face:

FF, RF, RTJ

Pressure:

Class 150# To 2500#

Size Range:

Customizable

Flange Standard:

ANSI B16.5

Highlight:

Gr.2N Carbon Steel Flange

Petrochemical Equipment Carbon Steel Flange

ASME tube side flange

Payment & Shipping Terms

Minimum Order Quantity

1 PC

Price

NON

Packaging Details

WOODEN CASE, Ply-Wooden Cases with Steel Frames

Delivery Time

1 - 4 MONTH

Payment Terms

T/T

Supply Ability

300 TONS / MONTH

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aaron@steelseamlesspipe.com

0086-574-88013900

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Product Description

ASME SA266 Gr.2N Tube Side Flange

ASME SA266 Gr.2N tube side flange is an economical and reliable medium and low pressure carbon steel connection solution suitable for non-corrosive working conditions. Tube Side Flange is used on the tube side of pressure vessels or heat exchangers to connect pipes or tube bundles and needs to withstand internal medium pressure and temperature.

Typical structure: welded neck flange (WN), slip-on flange (SO) or blind flange (BL), the specific type depends on the equipment design. Gr.2N has no significant corrosion resistance. If the medium contains sulfur or acidic components, it needs to be lined or replaced with stainless steel (such as SA182 F304).

Chemical Composition Requirements

Item	Chemical Req. for ASTM A266, %
Item	Gr. 1 & 2	Gr. 3	Gr. 4
C	≤ 0.30	≤ 0.35	≤ 0.30
Mn	0.40~1.05	0.80~1.35	0.80~1.35
P	≤ 0.025	≤ 0.025	≤ 0.025
S	≤ 0.025	≤ 0.025	≤ 0.025
Si	0.15~0.35	0.15~0.35	0.15~0.35

Mechanical Properties

Tensile Requirements	Gr. 1	Gr. 2 & 4	Gr. 3
T.S min. ksi [Mpa]	60~85 [415~585]	70~95 [485~655]	75~100 [515~690]
Y.S min. ksi [Mpa]	30 [205]	36 [250]	37.5 [260]
EL. in 2" or [62.5 mm] min. %	23 [21]	20 [18]	19 [17]
R.o.A min. %	38	33	30

ASTM A266 Grade	Brinell Hardness HBW
1	121~170
2	137~197
3	156~207
4	137~197

ASME SA266 Gr.2N Tube Side Flange Application

Heat exchanger: The tube flange connects the tube bundle and the shell, which needs to withstand cyclic thermal stress.

Reactor: Sealed connection under high-pressure reaction medium.

Petrochemical equipment: Pipeline system for transporting oil, gas or corrosive fluids in refineries.

ASME SA266 Gr.2N Carbon Steel Flange For Petrochemical Equipment 0

Ratings& Review

Overall Rating

4.7

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

67%

4 stars

33%

3 stars

2 stars

1 stars

All Reviews

A*d

Saudi Arabia Dec 29.2025

Helpful (3)

We installed this heat exchanger at our petrochemical facility in Jubail Industrial City back in March. The ASME VIII-1 certification was non-negotiable for us, and this unit delivered exactly what we needed. The SA516 Gr485 shell material has held up exceptionally well against our high-temperature process streams, even during the peak summer months when ambient temperatures exceed 45°C. What impressed me most was the quality of the welding—our inspection team did radiography testing on random seams, and all passed with flying colors. The supplier kept us updated throughout fabrication with photos and progress reports, which built a lot of trust. We've had zero leaks or performance issues since startup. Definitely planning to order another unit for our expansion project next year.

Wei Ming Tan

Malaysia Nov 10.2025

Helpful (3)

The welding quality was excellent—clean and uniform. We also appreciated that the supplier provided both English and Bahasa Malaysia nameplates, which helped with our local inspectors.

Mitchell

United States Jun 17.2025

Helpful (4)

We've been sourcing pressure vessels for 30 years, and this unit's ASME U-stamp certification gave us confidence from day one. The SA516 GR.70 material traceability documentation was impeccable—full MTRs, NDE reports, and third-party inspection by TÜV. Delivery to Houston was 3 weeks ahead of schedule. The 200kL capacity fits perfectly into our hydrocracker expansion project. Weld quality exceeded API 510 standards. Definitely adding this manufacturer to our approved vendor list.

Tags：

ASME SA266 Gr.2N Carbon Steel Flange For Petrochemical Equipment

Gr.2N Carbon Steel Flange

Petrochemical Equipment Carbon Steel Flange

ASME tube side flange

Gr.2N Carbon Steel Flange

Petrochemical Equipment Carbon Steel Flange

ASME tube side flange

ASME SA105 Flange And ASME SA516 GR485 Shell

ASME SA336 F11 Cl2 alloy Steel Tube Side Flange For High temperature and high pressure environment

ASME SA105 Body Flange ASME B16.5 For Pressure vessels, Shell And Tube Heat Exchangers

ASTM A182 F310 Weld Neck RTJ Flange For Oil And Gas Extraction Equipment

Overall Rating

Rating Snapshot

All Reviews

pressure vessel flange

heat exchanger flange

stainless steel forged flange

ASME SA266 GR.2N Tube Side Flange Connecting The Heat Exchanger Shell And The Tube Box

ASME SA105 Flange And ASME SA516 GR485 Shell

ASME SA336 F11 Cl2 alloy Steel Tube Side Flange For High temperature and high pressure environment

ASME SA105 Body Flange ASME B16.5 For Pressure vessels, Shell And Tube Heat Exchangers

ASTM A182 F310 Weld Neck RTJ Flange For Oil And Gas Extraction Equipment