Jyoti - Pipes

QUALITY TESTING

Jyoti pipes’s strong point is the quality of the products we supply to our customers. From the very first days of the company, it has always paid the utmost attention to the quality system and quality department. With two in-house laboratories, fully equipped for both destructive and non-destructive testing, Jyoti pipes is in a position to immediately assess the quality of its production and to investigate any arising conditions of the material.

Following the most stringent requirements from standards that govern the production of our welded tubes, the company prides itself on manufacturing high-quality products for the most demanding markets.

Duly certified as per:

ISO 14001:2004 - Certification for environmental management.
REACH (2007) - Full compliance with the European Chemicals Regulation
ISO 9001:2015 - Quality Management System certification.
ISO 45001:2018 - Certification for occupational health and safety.

Jyoti pipes can guarantee complete suitability of the products to customers’ needs. All manufactured tubes are technologically tested according to a QCP linked to every production. A full array of destructive and non-destructive tests guarantees the quality of the tubes, and the two in-house, fully equipped laboratories allow for immediate results, assessing production quality from start to end.

RHINOX QUALITY YOU CAN TRUST

At Rhinox, quality isn't an option — it's the foundation. With fully equipped in-house labs for destructive and non-destructive testing, every pipe undergoes rigorous checks to ensure flawless strength, weld integrity, and corrosion resistance.

We strictly follow DIN, German, and NB standards, making our SS304 & SS316L pipes ideal for potable water, air, gas, and industrial fluids.

NON DESTRUCTIVE TESTING

EDDY CURRENTTESTING

Eddy current testing is performed in-line on 100% of tubes produced, according to EN 10893-1/10893-2 or ASTM E426- E573-E309. Eddy current calibration and verification is performed by us. Rhinox level 2 and 3 staff qualified in accordance to EN- ISO9712 and SNT-TC-lA Non conform tubes are automatically segregated in non-conform area.

HYDROSTATIC TEST

Hydrostatic Testing is used to determine and verify the integrity of the tube. Rhinox can perform HT on 100% of tubes upon customer request up to pressure of 3000 psi

PIPES PMI TESTING

Pipe PMI (Positive Material Identification) testing ensures the material grade and composition of pipes match specifications using portable analyzers, preventing mix-ups and ensuring safety, quality, and compliance.

MECHANICAL TESTING (INDIA)

Tensile Test

Standard: IS 1608 (Part 1) / ISO 6892-1 — A prepared sample of the tube is subjected to a controlled longitudinal tensile force until fracture. This determines the ultimate tensile strength, yield stress, and percentage elongation. Tensile testing is carried out for every heat produced as per production standards. All results are systematically recorded and traceable as per ISO 9001 procedures.

Hardness Test

Standard: IS 1586 / IS 1501 (Part 1) / ISO 6507 / ISO 6508 — Hardness tests are performed on each production heat using Rockwell (HRC/HRB) or Vickers (HV) methods. Testing is carried out at the start of each production batch, and frequency is defined by the relevant Indian or international standard. Acceptance criteria are verified against the specification requirements for the respective material grade.

Burst Test

Standard: IS 2329 / ASTM A370 (as reference) — The burst test is carried out when specified by the customer to determine the maximum internal pressure that the tube can withstand before rupture. The test sample is filled with hydraulic oil and pressurized until failure, and the burst pressure is recorded. The fracture location and appearance provide valuable information regarding the weld quality and tube integrity.

Weld Seam Measurement

The internal and external weld seam height is measured using calibrated gauges. For bead-rolled tubes, the internal seam height is typically below 0.05 mm. External weld seams are ground to achieve a nearly flush surface finish as per IS 3601 or customer-specific requirements.

Intergranular Corrosion (IGC)

Standard: IS 9474 / ASTM A262 — Intergranular corrosion tests are conducted to evaluate the resistance of stainless steel tubes to grain boundary attack. The test ensures material stability after welding and heat treatment. Wall thickness can also be verified using ultrasonic measurement devices when required.

Dimensional Controls

Dimensional checks are carried out to verify outer diameter, wall thickness, and length in accordance with IS 3601 or applicable manufacturing standards. All measuring instruments and gauges are certified and periodically calibrated. Upon request, internal diameter and concentricity checks are also performed using precision gauges.

DESTRUCTIVE TESTS (INDIA)

Flange Test

Standard: IS 2328 / ISO 8493 — The flange test is used to evaluate the longitudinal weld ductility and the tube’s ability to withstand bending into a tube sheet. A section of tube is flanged at a right angle to the body without cracking or showing imperfections. Testing frequency is as per the production standard, with at least one test performed every hour.

Flaring Test

Standard: IS 2328 / ISO 8493 — This test determines the material’s ability to undergo plastic deformation. A tapered mandrel with a 60° angle is driven into a tube section, expanding its internal diameter to the specified ratio. Tubes showing cracks or surface imperfections are rejected. Tests are carried out at least once every hour or as per the production control plan.

Flattening Test

Standard: IS 2328 / IS 3601 / ISO 8492 — The flattening test assesses the ductility and soundness of the weld zone. A tube specimen is compressed between two parallel plates until a specified distance is reached. The absence of cracks or separations indicates satisfactory ductility. One test is performed at least every hour as per the quality plan.

Reverse Weld Bend Test

Standard: IS 1608 (Part 2) / ISO 5173 — This test evaluates the strength and ductility of welded joints. A tube section approximately 100 mm long is slit on both sides of the weld and bent 180° along the inner surface. Cracks or fractures in the weld area are not permitted. One sample is tested at least every production hour or as defined by the QA plan.

Drift Expansion / Grain Size Test

Standard: IS 2328 / ISO 8493 / IS 7739 (for microstructure analysis) — This test measures the ability of metallic tubes to undergo plastic deformation during expansion. The specimen end is expanded with a conical mandrel until the outer diameter increases by a specified percentage. Standard expansion ratios are typically greater than 20% for duplex and nickel alloys, and 25% for austenitic steels. Upon request, higher expansion (up to 50%) can be performed. Cracked specimens are rejected. One test is conducted every hour as per process control.

Reverse Flattening Test

Standard: IS 2328 / ISO 8492 — The reverse flattening test checks the weld ductility on the internal surface of the tube. A 100 mm long section is slit on both sides of the weld, opened, and flattened with the weld at the point of maximum bend. The sample must not exhibit cracks or openings along the weld seam. One test is performed at least every hour as per production standard.

Quality