Quanzhou SS347 Ring Joint Gasket

QS Gasket: Quanzhou SS347 Ring Joint Gasket

Product: Quanzhou SS347 Ring Joint Gasket
Size: 2 Inch
Material: Stainless Steel 347
Class: 300 #
Shape: Oval
Standard: ASME B16.20
Brand: Qishine

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SS 347 Ring Joint Gasket is a precision-machined metallic sealing component engineered for high-pressure and high-temperature pipeline systems.

It is specifically designed for use with ring type joint (RTJ) flanges, widely deployed across oil and gas pipelines, petrochemical plants,

power generation facilities, and offshore platforms.

As a trusted SS 347 Ring Joint Gasket supplier, Quanzhou has emerged as a significant sourcing hub for RTJ gaskets in the Asia-Pacific region.

Material & Temperature Performance
SS 347 (UNS S34700) is a niobium-stabilized austenitic stainless steel containing 18% chromium, 10% nickel, and niobium.

With a maximum hardness of 160 HB, it offers an operating temperature range from -250°C to 800°C.

The niobium addition prevents chromium carbide precipitation, delivering superior resistance to intergranular corrosion

in the 400–900°C range — a critical advantage for heat exchangers, steam lines, and refinery units subject to intermittent thermal cycling.

Compared to standard SS 304 and SS 316, SS 347 Ring Joint Gasket provides extended service life in high-temperature environments

where thermal fatigue and corrosion are persistent concerns.

RTJ Gasket Types
RTJ gaskets are available in three principal styles: Style R (oval or octagonal cross-section, for general high-pressure service),

Style RX (pressure-energized, self-sealing design with enhanced resistance to shock loads),

and Style BX (pressure-energized, rated for systems up to 20,000 psi).

Each style requires a matching groove profile on the flange and is not interchangeable across types.

Selection Criteria for Procurement Managers
When specifying SS 347 Ring Joint Gasket for a project, four factors directly impact seal integrity and total cost of ownership:

Hardness differential. The gasket should be at least 30 HB softer than the flange material.

This ensures the gasket deforms into the groove under bolt load, forming a metal-to-metal seal, while the flange face remains undamaged.

Standards compliance. Gaskets must conform to ASME B16.20 and API 6A specifications.

Each ring should bear permanent markings indicating ring number, material designation, and applicable standard for full traceability.

Surface finish control. Groove surface finish and gasket dimensional accuracy must be carefully controlled to maintain seal integrity across pressure and thermal cycles.

Ring Number verification. The Ring Number (e.g., R-23, RX-24, BX-152) determines the precise geometry.

This number must correspond to the flange groove per the relevant standard — not to a nominal pipe size.

Quality Manufacturing in Quanzhou
Quanzhou, a coastal city in Fujian Province, is home to a concentrated cluster of petrochemical and sealing product manufacturers.

The city’s petroleum and chemical industry has achieved a production value exceeding 100 billion RMB,

supported by major refining and chemical complexes in the Quangang and Quanhui petrochemical parks.

Local sealing manufacturers such as Enruike Sealing Materials (Quanzhou) produce a full range of metal gaskets,

including ring joint gaskets, and export to markets across Europe and Southeast Asia.

Quanzhou-based sealing product suppliers benefit from proximity to end-user demand — the city’s own refining

and chemical infrastructure generates substantial demand for high-specification RTJ gaskets.

This localized supply chain supports faster lead times and responsive custom manufacturing.

Quanzhou valve and sealing manufacturers hold API 6A, API 6D, and ISO 9001 certifications,

enabling them to serve international oil and gas clients with standards-compliant products.

For procurement teams evaluating SS 347 Ring Joint Gasket suppliers, Quanzhou offers a combination of manufacturing capability,

standards compliance, and export experience that meets the requirements of demanding industrial applications.

FAQ
Q1: What is the price range for SS 347 Ring Joint Gaskets in Quanzhou?
A: Pricing varies by size, RTJ type (R/RX/BX), and order quantity. Standard R-type SS 347 gaskets

typically range from $5 to $50 per piece depending on ring number. Quanzhou manufacturers offer competitive pricing with flexible MOQs starting from 10 pieces.

Q2: What is the typical lead time for SS 347 Ring Joint Gasket orders from Quanzhou?
A: Standard sizes ship within 7–15 business days. Custom or non-standard ring numbers may require 20–30 days.

Our SS 347 Ring Joint Gasket Quotation

Saratov Oblast project in Russia Quotation
Xiamen Qishine
Email:qishine@qishine.com			Website: www.cnqishine.com
Tel: +86-592-5255951			Date: 11th Jul. 2022
Quotation Ref.: 22QS0711			Contact Person: Amy
Price Valid Time: 7 days from the date of quotation.
Payment Terms: T/T 100% in advance to start the production.
Production time: 35 days from the date of receiving your advance payment.
Documents: CI&PL, B/L and Mill Test Certificates EN.10204.3.1.

№ п/п	item	Description	Q-ty	Size (inch)	Unit Price (USD)
1	SS 347 Ring Joint Gasket	Ring Gasket R-22 for flange 2"x 150	2	2
2	SS 347 Ring Joint Gasket	Ring Gasket R-23 for flange 2"x 300	10	2
Total					Ex-work

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