Duplex steel BA tube_Jiangyin Harmony Precision Steel Pipe Co., Ltd.

Product List

Featured Products

Thin Wall Bright Annealing (BA) Tube

Bright annealing (BA) is a part of stainless steel annealing process which is performed under reducing atmosphere or vacuum protection. The heating process gives the surface resistance to oxidation and a certain brightness. A thin wall BA tube is a bright annealed tube whose wall thickness is small relative to its outside diameter — down to 0.2mm (0.008") at Harmonypipe. The thin wall constructi

Thick Wall Bright Annealing (BA) Tube

Bright annealing (BA) is a part of stainless steel annealing process which is performed under reducing atmosphere or vacuum protection. The heating process gives the surface resistance to oxidation and a certain brightness. A thick wall BA tube is a bright annealed tube with a heavy wall relative to its outside diameter — up to 12mm*4mm (0.157") at Harmonypipe. The heavy wall construction deliv

Electro Polishing (EP) Tube

Electro polishing (EP) also known as electrochemical polishing anodic polishing or electrolytic polishing is an electrochemical treatment performed on the metal surface to remove the impurities and microscopic imperfections . The process leaves a shiny smooth ultra-clean surface finish.

Semiconductor Electro Polishing (EP) Tube

Electro polishing (EP) also known as electrochemical polishing anodic polishing or electrolytic polishing is an electrochemical treatment performed on the metal surface to remove the impurities and microscopic imperfections. The process leaves a shiny smooth ultra-clean surface finish. A semiconductor EP tube is an electro polished tube manufactured and processed specifically for semiconductor

Pure Water Washing EP 316L Tube

Electro polishing (EP) also known as electrochemical polishing anodic polishing or electrolytic polishing is an electrochemical treatment performed on the metal surface to remove the impurities and microscopic imperfections. The process leaves a shiny smooth ultra-clean surface finish. A pure water washing EP 316L tube is an electro polished TP316L (Ni ≥ 12%) tube that undergoes an additiona

Double Packaging Electro Polishing (EP) Tube

Electro polishing (EP), also known as electrochemical polishing, anodic polishing, or electrolytic polishing is an electrochemical treatment performed on the metal surface to remove the impurities and microscopic imperfections. The process leaves a shiny, smooth, ultra-clean surface finish. A double packaging EP tube is an electro polished tube protected by a two-layer cleanroom packaging system: a

Current location：Home > BA TUBEBA TUBE

Duplex steel BA tube Duplex Steel BA Tube， combines the advantages of austenitic and ferritic stainless steels offering approximately twice the yield strength of conventional austenitic grades. The BA finish further enhances the surface quality making Duplex BA tubes ideal for demanding service conditions. Send Inquiry WhatsApp

Tel: +86 13382293873 +86 18405115449

E-mail: info@harmonypipe.com jane@harmonypipe.com

Product Description

Duplex Steel BA Tube， combines the advantages of austenitic and ferritic stainless steels, offering approximately twice the yield strength of conventional austenitic grades. The BA finish further enhances the surface quality, making Duplex BA tubes ideal for demanding service conditions.

Duplex Steel BA Tube Applications Duplex BA tubes are widely used in industries that require high strength combined with excellent corrosion resistance. Key application areas include:

·Oil & Gas Industry — Offshore platforms, subsea equipment, sour gas pipelines, chemical injection lines, hydraulic control lines, and instrumentation umbilicals
·Marine & Offshore Engineering — Deep-sea platforms, submarine pipelines, seawater handling systems, and fire-fighting systems
·Chemical Processing — Heat exchangers, reaction vessels, and process piping in corrosive media environments
·Desalination Plants — Seawater desalination equipment and brine handling systems
·Pulp & Paper Industry — Digester and bleach plant equipment
·Heat Exchanger Systems — Refineries, power plants, and chemical processing units

Product Detail

Parameter	Value
Product Name	Duplex Bright Annealing Tube (Duplex BA Tube)
Outside Diameter	3/16" ~ 2" (4.76mm ~ 50.8mm)
Wall Thickness	0.028" ~ 0.188" (0.71mm ~ 4.78mm)
Manufacturing Standard	ASTM A213, ASTM A269
Forming Process	Cold Rolling & Cold Drawing
Standard Length	6 meters / each, or customized
OD Tolerance	±0.1mm (3/16"~1 1/2"), ±0.2mm (1 1/2"~3 1/2")
WT Tolerance	±8% (3/16"~1 1/2"), Nominal (1 1/2"~3 1/2")

Material Grade

Grade	UNS	ASTM	EN
2507	S32750	S32750	1.4410
2205	S31803	S31803	1.4462

Notes

1. 2507 (S32750) is a super duplex stainless steel; the EN designation is 1.4410 (X2CrNiMoN25-7-4).
2. 2205 (S31803) and S32205 share the EN 1.4462 designation; S32205 is the modern variant with tighter N control.

Production Standard

Standard	Description
ASTM A213	Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A269	Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A270	Seamless and Welded Austenitic Stainless Steel Sanitary Tubing
ASTM A789	Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

Dimension Tolerance

Outside Diameter (OD)	Tolerance OD (mm)	Tolerance WT (%)
3/16" ~ 1 1/2"	±0.1	±8
1 1/2" ~ 3 1/2"	±0.2	±8

Nominal Length: 6 meters / each, or customized.
If higher outside diameter tolerance is required, welcome to contact us. Roughness BA Roughness:
✓ Outer: Ra ≤ 0.4 ~ 0.8 µm
✓ Inner: Ra ≤ 0.4 ~ 0.8 µm
We commonly provide around 0.8 µm. Also can be customized. Maximum Allowable Working Pressure Rating (316L Seamless) Unit: Psi

OD \ WT	0.010	0.012	0.014	0.016	0.020	0.028	0.035	0.049	0.065	0.083	0.095	0.109	0.120	0.134	0.156	0.188
1/16	5600	6900	8200	9500	12100	16800
1/8						8600	10900	10300
3/16						5500	7000	7500
1/4						4000	5100		10300
5/16								4100	5900	8100	6700
3/8								3300	4800	6600	5000
1/2								2600	3700	5100	4200	5800
5/8								3000	4000	5200	6100
3/4								2400	3300	4300	5000	4900
7/8								2100	2800	3600	4200
1										2400	3200	3700	4700	4100	4900	4500
1-1/4										2500	2900	3300	3700	3400	4000
1-1/2										2400	2400	3000	3000
2												2000	2200	2500	2900	3200

Final Inspection

Surface Quality
OD & WT, Length, Straightness, roughness BA and endoscopy.
Chemical Composition
Spectrum analysis.
Mechanical Test
Tensile，Yield， Elongation (%，)Hardness (HRB)
NDT (Non-Destructive Testing)
ET (Eddy Current testing).
PMI (Positive Material Identification)
Direct-reading spectrometer.
Marking and Color Coding
Marking and color coding available if required.

Packing

All tubes are protected with caps at both ends + PE bag + wooden case.
1. End Capping — Both ends of each tube are protected with caps.
2. PE Bag — Tubes are bagged in polyethylene for cleanliness.
3. Wooden Case — Finally placed in wooden cases for maximum protection during shipment.