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ASTM A403 WP347-WX Stainless Steel Pipe Fitting ASME B16.9 Buttweld Equal Tee

Categories Steel Fitting
Brand Name: YUHONG
Model Number: ASTM A403 WP347 Stainless Steel Equal Tee
Certification: API, PED , ABS, DNV, BV, LR
Place of Origin: CHINA
MOQ: 1 PC
Payment Terms: L/C, T/T
Delivery Time: 7 DAYS
Packaging Details: PLY-WOODEN CASE OR PALLET
Product Name: Stainless Steel Tee
Standard: ASTM A403 / ASME SA403
Material: 347, 1.4550, X6CrNiNb18-10
Sizes: 1/2" to 48"
Wall Thickness Available: SCH.10S to SCH.XXS
Shape: Equal Tee, Reducing Tee, Y Tee
Type: Seamless, Welded
High Light: ASTM A403 WP347 Stainless Steel Tee, ASME B16.9 Buttweld Pipe Fittings
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Yuhong Group Co.,Ltd
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ASTM A403 WP347-WX Stainless Steel Pipe Fitting ASME B16.9 Buttweld Equal Tee

ASTM A403 / ASME SA403 WP347-WX Equal Tee, Stainless Steel Buttweld Pipe Fitting


The specification ASTM A403 is standard in the chemical, petrochemical, and power generation industries where resistance to intergranular corrosion after welding or exposure to high temperatures is required. WP347 Buttweld Tee is a high-chromium, nickel, columbium-stabilized stainless steel pipe fitting. It is designed to be welded into a piping system and is specifically engineered to resist corrosion and maintain strength in high-temperature environments that would cause standard 304 stainless steel to fail.

ASTM A403 WP347-WX Stainless Steell Pipe Fitting Buttweld Tee Equivalent Grades

STANDARDWERKSTOFF NR.UNSJISGOSTEN
SS 3471.4550S34700SUS 34708Ch18N12BX6CrNiNb18-10
SS 347H1.4961S34709SUS 347HX6CrNiNb18-12

ASTM A403 WP347-WX Stainless Steell Pipe Fitting Buttweld Tee Chemical Composition

Element %347347H
Chromium17.00 min.-19.00 max.17.00 min.-19.00 max.
Nickel9.00 min.-13.00 max.9.00 min.-13.00 max.
Carbon0.080.04 min.-0.10 max.
Manganese22
Phosphorus0.0450.045
Sulfur0.030.03
Silicon0.750.75
Columbium & Tantalum10 x (C + N) min.-1.00 max.8 x (C + N) min.-1.00 max.
IronBalanceBalance

ASTM A403 WP347-WX Stainless Steell Pipe Fitting Buttweld Tee Mechanical Properties

Grade347 / 347H
Tensile Strength (MPa) min515
Yield Strength 0.2% Proof (MPa) min205
Elongation (% in 50mm) min40
Rockwell B (HR B) max92
Brinell (HB) max201

Heat Treatment Requirements

This is the most critical part of the specification. SS347 is a stabilized grade, the heat treatment (if required) differs slightly from standard 304.

  • Solution Annealing (Required for cold worked fittings):

    • Temperature: Heat to a minimum of 1900°F (1040°C) .

    • Quenching: Rapid cooling (water quenching or rapid air cool) is required.

    • Why? To dissolve any chromium carbides that may have formed and to put the Columbium into a state where it can effectively stabilize the structure.

  • Stabilization Annealing (Optional but beneficial):

    • Sometimes, fittings are given an additional heat treatment at 1550°F to 1650°F (843°C - 899°C). This allows the Columbium to fully "find" and combine with the Carbon, ensuring maximum resistance to intergranular corrosion in severe service.


Applications

  • Chemical Processing Plants: Handling nitric acid, and other chemicals where sensitization leads to rapid failure.
  • Refineries: High-temperature hydrocarbon service.
  • Power Generation: Boiler components, superheater tubes, and steam lines operating at high temperatures.
  • Aerospace: Exhaust manifolds and engine components.
  • Food Processing: Equipment requiring sterilization at high temperatures.

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