Name: Studded Tubes Base Tube ASTM A335 P22 High Temperature Resistant
Brand: Yuhong Group Co.,Ltd
SKU: STUDDED TUBE
Price: 100,000.00 USD
Availability: InStock

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Studded Tubes Base Tube ASTM A335 P22 High Temperature Resistant

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	STUDDED TUBE

Payment & Shipping Terms:

Minimum Order Quantity:	10PCS
Price:	Negotiable
Packaging Details:	IRON FRAME WOODEN CASE
Delivery Time:	Depends on quantity
Payment Terms:	L/C,T/T
Supply Ability:	1000 tons per month

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Detailed Product Description

Base Pipe Material Grade:

ASTM A335 P22

Stud Density Range 120 - 400 Pins Per Square Foot (customizable):

X120 - 400 Pins Per Square Foot (customizable)

Pressure Rating:

≥20 MPa (2900 Psi) At 500°C

Key Applications:

Power Boilers, Petrochemical Reactors, Waste-to-Energy Systems

Highlight:

Studded Tubes

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1. Premium Product Introduction

ASTM A335 P22 Studded Tubes are engineered for extreme thermal applications. These tubes feature high-density studs (pins) welded onto A335 P9 base pipes, significantly expanding heat exchange surface area by 3-5x. Ideal for Waste Heat Boilers (WHB), HRSG, and catalytic reformers, they withstand temperatures up to 600°C (1112°F) and pressures exceeding 20 MPa.

2. Superior Manufacturing Process & Quality Control

Process Stage	Key Details	Quality Assurance
Base Pipe Selection	ASTM A335 P9 seamless pipes, UT tested & certified to ASME Sec. II	MTC with traceability
Stud Welding	Automated GTAW process; Stud height: 6-25mm; Density: 120-400 pins/ft²	Shear strength ≥200 MPa
Heat Treatment	Normalizing at 950°C + Tempering at 730°C per ASTM A335	Hardness: 190-220 HB
NDT	100% Dye Penetrant Testing (PT) on welds + Hydrostatic test (1.5x design pressure)	ASME Sec. V compliant

3. Base Pipe Chemical Composition (ASTM A335 P22)

Element	ASTM A335 P22 Requirement	Typical Manufacturer Control Range
Carbon (C)	0.05 - 0.15	0.08 - 0.12
Manganese (Mn)	0.30 - 0.60	0.35 - 0.55
Phosphorus (P)	≤ 0.025	≤ 0.020
Sulfur (S)	≤ 0.025	≤ 0.015
Silicon (Si)	0.50 Max	0.15 - 0.35
Chromium (Cr)	1.90 - 2.60	2.00 - 2.40
Molybdenum (Mo)	0.87 - 1.13	0.90 - 1.05

4. Dimensional Tolerances

Parameter	Tolerance Standard	Range (Typical)
Base Pipe OD	ASME B36.10M	±0.75% (min ±0.10mm)
Wall Thickness	ASME B36.10M	+20% / -12.5%
Stud Height	EN 12451	±0.3mm
Stud Diameter	Custom	±0.2mm
Straightness	ASTM E213	≤1.5mm/m length