Sealing Technology & Engineering Products Manufacturing

Welcome to the

Ferrous & Nonferrous

of PT. Arezda Purnama Loka

<STI>®, “Seamless Tube Indonesia”
is the exclusive brand of PT. Arezda Purnama Loka. It is the Seamless Cold-Drawn Pressure Vessel Tubes for Oil & Gas application.


Our Quality Assurance and Product Certification is done according to international standards through various tests and in spections right at our own Workshop and Lab. Facilities covering NDT, Test of Chemical and Mechanical Properties by means of various testing machines and equipment such as Spectrometer, PMI (Positive Material Identification), UTM (Universal Testing Machine), Hardness Tester, Eddy Current Testing Machine, Surface Roughness Tester, Hydrostatis Test, Metallographic Inspection, and other specific inspections as per customer’s requirements such as Heat Treatment, Surface Treatment, Anti Corrosion, etc.
To maintain continuous quality assurance and ensure prime quality products, Arezda adopts and persues high standards of continuous quality management throughout the entire production processes. Tubes are 100% Eddy Current tested, verified for tolerances on size, thickness, surface quality, chemical & mechanical properties, and other metallographic inspections.


PT. Arezda Purnama Loka, under STI Brand produces the following specifications of tubes:

Tube OD 0.5” to 3”
Tube Thickness 0.8 – 4.5 mm (or as per customer’s request)
Tube Length up to 16 m (or as per customer’s request)

ASTM / ASME Material Grade Standards

Carbon Steel SA-179
Ferritic / Austenitic Alloy Steel SA-213
T5 / T9 / T11 / T12 / T22
TP304 / TP304L / TP316 / TP316L / TP321 / TP347
TP410 / TP430
Copper / Copper Alloy SB-111
C44300 / C61400 / C68700 / C70600 / C71500
Titanium SB-338
Gr.2 / Gr.7
Aluminium Various


In addition to the Oil & Gas application, Seamless Tubes are widely used in various other industries such as textile, medical, food, machinery, marine, corrosion-resistant piping & structural construction, and  many other applications still.

<INGIProducts for the Petroleum/Oil & Gas,
Petrochemical, Chemical, Power, and other Process Industries