Bright Annealing (BA) Tube_Jiangyin Harmony Precision Steel Pipe Co., Ltd.

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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

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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. Send Inquiry WhatsApp

Tel: +86 13382293873 +86 18405115449

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

Product Description 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.
BA Tube Applications BA (bright annealing) tubes are widely used in oil & gas, semiconductor, solar chemical industry, medicine, instrumentation and other industries that require high-precision dimensions and accurate dimensions. Product Detail

Parameter	Value
Product Name	Bright Annealing Tube (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
304L	S30403	304L	1.4307
316L	S31603	316L	1.4404
316Ti	S31635	316Ti	1.4571
321	S32100	321	1.4541
310S	S31008	310S	1.4845
904L	N08904	904L	1.4539
2507	S32750	S32750	1.4410
2205	S31803	S31803	1.4462
Hastelloy C-276	N10276	N10276	2.4819
Hastelloy C-22	N06022	N06022	2.4602
Monel 400	N04400	N04400	2.4360
Inconel 600	N06600	N06600	2.4816
Incoloy 800	N08800	N08800	1.4876
GH3030 (GB/T 14992)	—	—	—

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.
3. Hastelloy C-22 (UNS N06022 / EN 2.4602) is a Ni-Cr-Mo alloy with high resistance to oxidizing and reducing media.
4. Hastelloy C-276 (UNS N10276 / EN 2.4819) is the most widely used Ni-Cr-Mo alloy; often called the "universal" corrosion-resistant alloy.
5. Monel 400 (UNS N04400 / EN 2.4360) is a Ni-Cu alloy with excellent resistance to seawater, hydrofluoric acid, and reducing media.
6. Inconel 600 (UNS N06600 / EN 2.4816) is a Ni-Cr-Fe alloy with outstanding high-temperature oxidation resistance (up to 1100°C) and resistance to stress corrosion cracking.
7. Incoloy 800 (UNS N08800 / EN 1.4876) is a Ni-Fe-Cr alloy offering good high-temperature performance at lower nickel content; widely used in petrochemical furnace tubes and heat-treatment equipment. Variants: 800H (N08810 / 1.4958), 800HT (N08811 / 1.4959).
8. GH3030 (GB/T 14992) is a Chinese national-standard solution-strengthened Ni-Cr base superalloy; originally developed from Russian ߢИ435 (EI435). Main composition: Ni bal., Cr 19~22%, Ti 0.15~0.35%. Service temperature up to 800°C; good oxidation resistance, formability and weldability. Used in aero-engine combustors, afterburners and high-temperature structural parts. It has NO direct UNS/ASTM/EN equivalent (marked "—"); performance is similar but not identical to Inconel 600. 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.