Annealed & Pickled (Ap) Tubes Supplier

Cera Pure Steel | ISO Certified | Seamless & Welded | Custom AP Tubes | Global Exporter

Annealed & Pickled (AP) Tubes Manufacturer in India

Trusted Annealed Pickled Tube Manufacturer in India

Cera Pure Steel is a leading Annealed Pickled Tube Manufacturer in India, supplying premium-quality SS AP Tubes to industries across India and around the world. As a fully certified Stainless Steel AP Tube Producer in India, we manufacture both seamless and welded AP tubes in all major stainless steel grades — from SS 304 and SS 316L to SS 321, SS 347, SS 310S, and SS 904L.

Our AP Tubes go through a controlled annealing and pickling process that removes surface oxides and heat tint, delivering a clean, corrosion-resistant surface finish ideal for critical industrial environments. Whether you need AP tubes for heat exchangers, HVAC systems, oil & gas pipelines, chemical plants, or power plants, Cera Pure Steel has the right product, grade, and size for your application.

As a reliable Industrial Annealed Pickled Tube Exporter in India, we supply to clients in the Middle East, Europe, Southeast Asia, Africa, and the Americas. Our Stainless Steel AP Tube Factory in India is equipped with advanced manufacturing and testing infrastructure to ensure every tube meets international standards.

AP Tubes Manufacturer in India | SS AP Tube Supplier | Annealed Pickled Tube Coils | SS Tubes & AP Tube Stockist India

Cera Pure Steel is a major AP Tubes Manufacturer in India and one of the most dependable SS AP Tube Suppliers for domestic and international buyers. We maintain large ready stocks of AP tubes in straight lengths and coil form — making us a go-to SS Tubes & AP Tube Stockist in India for buyers who need fast availability without waiting on production lead times.

Our Annealed Pickled Tube Coils are available in small-bore and medium-bore sizes and are widely used in refrigeration, HVAC, instrumentation, and process industries. We also supply AP tube and pipe fittings in India, offering a complete sourcing solution from a single vendor. Our SS annealed pickled pipes and tubes are long-lasting, low maintenance, and easy to install — making them the preferred choice for engineers and procurement teams across industries.

Sizes

1/4″ NB to 24″ NB Seamless 1/4″ NB to 48″ NB Welded

Thickness

SCH 5 to SCH XXS

Specifications

ASTM A312, A249, A269, A270

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International Export — Industrial Annealed Pickled Tube Exporter India

Cera Pure Steel is an active Industrial Annealed Pickled Tube Exporter in India, shipping AP tubes to clients in more than 30 countries. All export shipments include full documentation — MTC, packing list, invoice, certificate of origin, and third-party test reports where required.

North America: USA, Canada, Mexico

South America: Brazil, Argentina, Chile, Peru, Colombia

Europe: Germany, France, Italy, Spain, Netherlands, Belgium, Poland, Austria, Switzerland, United Kingdom

Middle East: Saudi Arabia, UAE, Qatar, Oman, Kuwait, Bahrain

Asia: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Philippines, Japan, South Korea, Sri Lanka, Bangladesh, Nepal

Africa: South Africa, Egypt, Nigeria, Kenya, Tanzania, Morocco

Oceania: Australia, New Zealand

Note: – All shipments are supplied with export-grade packaging and complete documentation.

We Supply SS AP Tubes Across India

Cera Pure Steel has active supply networks as a SS AP Tube Supplier in India across all major industrial cities:

Mumbai & Navi Mumbai — Maharashtra’s biggest industrial hub
Gujarat — Ahmedabad, Rajkot, Surat, Vadodara, Jamnagar
Pune, Nashik, Pimpri-Chinchwad — automotive and engineering belts
Chennai, Bangalore, Coimbatore — South India’s manufacturing hubs
Hyderabad, Visakhapatnam, Vijayawada — AP & Telangana
Delhi NCR, Ghaziabad, Lucknow — North India industrial corridors
Kolkata, Bhubaneswar, Kharagpur — East India

Annealed & Pickled (AP) Tube Specifications

All Stainless Steel AP Tubes supplied by Cera Pure Steel are manufactured to meet international standards. Below are the standard specifications we offer:

Parameter	Details
Standard	ASTM A213 / ASTM A269 / ASTM A249 / EN 10216-5 / DIN 17456
Material	Stainless Steel (SS 304, 304L, 316, 316L, 321, 347, 310S, 904L)
Tube Type	Seamless & Welded Annealed & Pickled (AP) Tubes
Outer Diameter	6 mm to 273 mm (Custom sizes available)
Wall Thickness	0.5 mm to 12 mm
Length	Single Random (4–7 m) / Double Random (8–14 m) / Cut to Length
Surface Finish	Annealed & Pickled (AP) — mill finish, oxide-free surface
End Condition	Plain End / Beveled End / Threaded
Pressure Rating	Up to 300 Bar (depending on grade, OD, and wall thickness)
Form	Straight Tubes / Coils / U-Tubes
Hardness	Brinell ≤ 200 HB / Rockwell ≤ 90 HRB
Inspection & Test	Hydrostatic Test / Eddy Current Test / Ultrasonic Test / PMI / MPI / LPI

Available Grades — ASTM A182 Stainless Steel AP Tubes

We produce and supply SS AP Tubes in all major stainless steel grades. Each grade is carefully selected based on corrosion resistance, temperature rating, and mechanical performance requirements:

Grade	UNS No.	DIN / EN	JIS	Tensile (MPa)	Yield (MPa)
SS 304	S30400	1.4301 / X5CrNi18-10	SUS 304	515 min	205 min
SS 304L	S30403	1.4307 / X2CrNi18-9	SUS 304L	485 min	170 min
SS 316	S31600	1.4401 / X5CrNiMo17-12-2	SUS 316	515 min	205 min
SS 316L	S31603	1.4404 / X2CrNiMo17-12-2	SUS 316L	485 min	170 min
SS 321	S32100	1.4541 / X6CrNiTi18-10	SUS 321	515 min	205 min
SS 347	S34700	1.4550 / X6CrNiNb18-10	SUS 347	515 min	205 min
SS 310S	S31008	1.4845 / X8CrNi25-21	SUS 310S	515 min	205 min
SS 904L	N08904	1.4539 / X1NiCrMoCu25-20	—	490 min	220 min

Grade Selection Guide: SS 304 / 304L — General-purpose, food & beverage, chemical service. SS 316 / 316L — Marine, high-chloride, pharmaceutical. SS 321 — High-temperature, aerospace, power generation. SS 347 — Elevated temperature with stabilisation. SS 310S — Extreme heat, furnace components. SS 904L — Highly aggressive acid and chloride environments.

ASME BPE Standards & Surface Finish Requirements

Surface Designation	Ra Value (µm)	Application	Finish Type
SF1	≤ 0.8	General pharmaceutical, food processing	Mechanical polish
SF2	≤ 0.6	High-purity water, clean steam	Mechanical + light EP
SF3	≤ 0.5	Critical pharmaceutical processes	Enhanced mechanical
SF4	≤ 0.4	Sterile processing, biotechnology	Electropolished
SF5	≤ 0.3	Ultra-high purity, API manufacturing	Premium electropolish

Chemical Composition of SS AP Tubes

The table below shows the chemical composition for each available grade of our Stainless Steel Annealed Pickled Tubes:

Grade	C	Mn	Si	P	S	Cr %	Ni %	Mo %
304	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–10.5	—
304L	≤0.03	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–12.0	—
316	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	16.0–18.0	10.0–14.0	2.0–3.0
316L	≤0.03	≤2.00	≤1.00	≤0.045	≤0.030	16.0–18.0	10.0–14.0	2.0–3.0
321	≤0.08	≤2.00	≤1.00	≤0.040	≤0.030	17.0–19.0	9.0–12.0	—
347	≤0.08	≤2.00	≤1.00	≤0.040	≤0.030	17.0–19.0	9.0–13.0	—
310S	≤0.08	≤2.00	≤1.50	≤0.045	≤0.030	24.0–26.0	19.0–22.0	—
904L	≤0.02	≤2.00	≤1.00	≤0.040	≤0.030	19.0–23.0	23.0–28.0	4.0–5.0

Mechanical Properties of AP Tubes

Every batch of AP Tubes manufactured by Cera Pure Steel meets or exceeds the following mechanical property requirements:

Grade	Tensile (MPa)	Yield 0.2% (MPa)	Elongation %	Heat Treatment (°C)	Hardness
304	515 min	205 min	35% min	1010–1120 (Solution)	≤200 HB
304L	485 min	170 min	35% min	1010–1120 (Solution)	≤200 HB
316	515 min	205 min	35% min	1010–1120 (Solution)	≤200 HB
316L	485 min	170 min	35% min	1010–1120 (Solution)	≤200 HB
321	515 min	205 min	35% min	920–1150 (Stabilize)	≤200 HB
347	515 min	205 min	35% min	980–1100 (Solution)	≤200 HB
310S	515 min	205 min	30% min	1040–1135 (Solution)	≤217 HB
904L	490 min	220 min	35% min	1100–1150 (Solution)	≤200 HB

Dimensional Tolerances — AP Tubes

As a precision Stainless Steel AP Tube Factory in India, we hold tight dimensional tolerances across all sizes. Custom tolerances available on request:

OD Range	OD Tolerance	Wall Thickness	WT Tolerance
6 – 25 mm	± 0.10 mm	0.5 – 3.0 mm	± 10%
25 – 50 mm	± 0.15 mm	1.0 – 5.0 mm	± 10%
50 – 100 mm	± 0.25 mm	2.0 – 8.0 mm	± 12.5%
100 – 150 mm	± 0.40 mm	3.0 – 10.0 mm	± 12.5%
150 – 273 mm	± 0.50 mm	4.0 – 12.0 mm	± 12.5%

What Are Annealed & Pickled (AP) Tubes?

Annealing is a heat treatment process where tubes are heated to a controlled high temperature and then slowly cooled. This relieves internal stresses, restores ductility, and softens the material — making the tube easier to bend, form, and weld. The process also ensures a uniform grain structure throughout the tube wall.

Pickling follows annealing. The tube surface is treated with an acid solution (typically a mix of nitric and hydrofluoric acid) to remove the oxide layer, heat tint, and scale formed during the annealing process. This restores the tube’s natural chromium-oxide passive layer — which is what gives stainless steel its corrosion resistance.

The result is an Annealed & Pickled (AP) Tube with excellent corrosion resistance, a clean matte silver surface, stress-free structure, and superior weldability. AP tubes are the most widely used form of stainless steel tubes in heavy industry — particularly for heat exchangers, chemical reactors, oil & gas pipelines, and power plant applications

How Cera Pure Steel Manufactures AP Tubes

Cera Pure Steel follows a strict, quality-controlled manufacturing process for every batch of Annealed Pickled Tubes

Raw Material Inspection — certified SS coils and billets tested for chemical composition via PMI before production begins
Tube Forming — hot extrusion (seamless) or TIG/plasma welding (welded) to form the tube shell
Cold Drawing / Rolling — tubes are drawn or rolled to achieve the precise OD, wall thickness, and surface finish
Annealing — controlled furnace heat treatment at 1010°C–1150°C (depending on grade) followed by rapid quenching
Pickling — immersion in acid bath to remove surface oxide and restore passive layer
Straightening & Cutting — hydraulic straightening to ASTM straightness tolerances, then cut to exact lengths
Non-Destructive Testing (NDT) — Eddy Current Test, Ultrasonic Test, Hydrostatic Test, and visual inspection
Dimensional Inspection — 100% OD, wall thickness, and length verification using calibrated instruments
Chemical & Mechanical Testing — per heat / lot, MTR issued for each shipment
Surface Passivation & Marking — tubes marked with grade, heat number, size, and standard
Export Packing — polythene-wrapped, bundled in steel strapping, and packed in wooden crates or on pallets

Types of SS AP Tubes We Supply

As a full-range SS AP Tube Supplier in India, Cera Pure Steel offers the following types:

Seamless AP Tubes — No weld seam, highest pressure rating, ideal for high-pressure oil & gas and chemical service
Welded AP Tubes — TIG or plasma-welded, cost-effective for medium-pressure applications and heat exchangers
AP Tube Coils — Small-bore tubes wound into coils for refrigeration, HVAC, and instrumentation
U-Bend AP Tubes — Pre-bent U-tubes for shell & tube heat exchanger bundles
AP Tubes with Special Ends — beveled ends, threaded ends, or plain ends as required
Large-Bore AP Tubes — OD up to 273 mm for industrial piping and heat exchanger shell-side applications
AP Tube Bundles — pre-assembled tube bundles for direct heat exchanger installation

Applications of Annealed & Pickled Tubes

Our AP Tubes for industrial heat exchangers and other critical applications are trusted by project engineers, EPC contractors, and procurement teams across multiple sectors:

Industry	Application
Heat Exchangers	Shell & tube heat exchangers, condenser tubes, evaporator coils — AP tubes for heat exchangers India
Oil & Gas	Refinery process lines, offshore pipelines, instrument tubing — AP tubes for oil & gas India
Chemical Plants	Acid handling, solvent transfer, reactor feed lines — AP tubes for chemical plants India
Power Plants	Boiler tubes, superheater tubes, steam lines — AP tubes for power plants India
HVAC Systems	Cooling coils, chiller lines, refrigerant piping — HVAC AP tubes supplier India
Pharmaceutical	Clean process lines, CIP/SIP systems, sterile fluid transfer
Dairy & Food	Hygienic process piping, pasteurizer tubes, UHT lines
Pulp & Paper	Digesters, evaporators, bleaching plant piping
Desalination	Seawater evaporator tubes, brine transfer lines
Aerospace & Defence	Hydraulic lines, fuel transfer, high-pressure instrument tubing

Why Choose Cera Pure Steel as Your AP Tube Supplier in India?

Here is what makes Cera Pure Steel the preferred choice for SS AP Tubes in India and internationally:

ISO-certified manufacturing — consistent quality on every order
All major grades in stock — SS 304, 304L, 316, 316L, 321, 347, 310S, 904L
Seamless and welded AP tubes both available
Straight tubes and coils in all standard sizes
Full MTR (Material Test Reports) for every shipment
Third-party inspection (TPI) support — SGS, Bureau Veritas, Lloyds, TÜV
Competitive pricing with no compromise on quality
Fast delivery across India — Mumbai, Gujarat, Chennai, Pune, Hyderabad, Delhi
International export experience — Middle East, Europe, USA, Southeast Asia, Africa
Custom sizes, cut lengths, and special packaging available on request
Single-vendor supply of AP tubes and pipe fittings for complete project requirements

Packaging & Delivery

Cera Pure Steel packs all SS AP Tube shipments in export-worthy packaging to protect against transit damage:

Polythene sleeve + PVC end caps on each tube for surface protection
Bundled with steel strapping in defined lot sizes
Wooden crates or pallets for international shipments
Custom packaging as per buyer specifications or project requirements
Each bundle marked with: grade, heat number, size, standard, order reference

Frequently Asked Questions (FAQs)

01.
What is the difference between AP tubes and BA tubes?

AP (Annealed & Pickled) Tubes have a matte silver finish after the pickling acid removes surface oxides. They are primarily used in heavy industrial applications — heat exchangers, oil & gas, chemical plants. BA (Bright Annealed) Tubes are annealed in a controlled hydrogen atmosphere, resulting in a shiny, reflective surface with no oxide formation. BA tubes are preferred in pharmaceutical, food, dairy, and cosmetic applications where surface finish and cleanability are critical. Cera Pure Steel supplies both — contact us for the right recommendation for your application.

02.
Which grades of AP tubes are most commonly used for heat exchangers?

For AP tubes for heat exchangers in India, SS 316L is the most popular choice due to its superior corrosion resistance in chloride-containing cooling water. SS 304 is used where the service environment is less aggressive. For high-temperature heat exchangers, SS 321 or SS 347 are preferred. For seawater service, SS 904L offers the best chloride resistance. Cera Pure Steel stocks all these grades ready for immediate despatch.

03.
Can you supply AP tubes in coil form?

Yes. Cera Pure Steel supplies Annealed Pickled Tube Coils in OD sizes typically from 6 mm to 50 mm. Coils are used extensively in HVAC, refrigeration, instrumentation, and process industries where flexibility and long continuous lengths are needed. Minimum and maximum coil weights can be specified as per your requirements.

04.
Do you provide Material Test Reports (MTR) with AP tube shipments?

Yes, every SS AP Tube shipment from Cera Pure Steel comes with a Material Test Report (MTR) covering chemical composition, mechanical properties, heat treatment details, and test results (hydrostatic, eddy current, dimensional). We also support third-party inspection by agencies like SGS, Bureau Veritas, Lloyds Register, and TÜV on request.

05.
Do you supply AP tubes for export? What countries do you ship to?

Yes, Cera Pure Steel is a fully active Industrial Annealed Pickled Tube Exporter in India. We ship to clients in 30+ countries including Saudi Arabia, UAE, Oman, Qatar, Germany, the UK, USA, Singapore, Malaysia, Nigeria, and South Africa. All export shipments include full documentation — MTC, packing list, invoice, certificate of origin, and third-party inspection reports where applicable. Contact us for FOB / CIF pricing.

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