AB&S-AVVITO has been offering for years as a reliable and experienced partner in the outsourcing production and supply of specific bolts for the petrochemical industry and accessories for valves and oil and gas extraction and refining plants.

Taking advantage of the experience of AB&S SRL in this sector and combining it with the flexibility and capacity of Avvito Service SRL’s commercial structure, we have become highly qualified suppliers of numerous plants of leading multinational companies in these sectors..

The ASTM, ASME, NACE AND API standards are of daily consultation for us and their in-depth knowledge, allows us to identify and provide with confidence what customers require us.

Our production units, each highly specialized in a type of production, allow us to offer both special standards (e.g. tie rods for flanges), as well as details made to design (e.g. valve components: thrust rings, plugs, and keys, etc.).

Being able to produce bonnet bolts with relevant weights, we can produce them for the heads of oil wells..

We have in stock a good selection of HEXAGONAL HEAD SCREWS , TCEI SCREWS AND TIE RODS in material A193 B7/B7M and A320 L7/L7M, with their nuts, with the possibility of performing a variety of treatments and coatings specific to the sector – ELECTROLYTE GALVANIZATION (ASTM B633 ) – HOT DIP GALVANIZING (HDG ASTM A153/F2329) – CHEMICAL NICKEL PLATING; NIPLOY PROCESS (ASTM B733; AND TEFLON, being able to offer the product for each need Withford® Xylan®.

For our customers who need to use hardware in extraction and refining environments, particularly exposed to Hydrogen Sulfide (H2S), we provide hardware with specific hardness tests to certify compliance with NACE specifications.

In addition to the main grades of ASTM/ASME A193 /A320 /A194 standards, we can offer special molded and turned products in a wide range of alloys and super alloys:

– Carbon steel for high and low temperatures (es. A193 B16 / A320 L43)

– Austenitic, martensitic, precipitation, duplex and super duplex stainless steels

– Nickel-based alloys so-called exotic materials: es. Hastelloy® C276- Monel®500K – Inconel®625 – Inconel®718

The ISO 9001:2015 certification, with PED extension, allows us to supply and certify bolts for pressure vessels, subject to the requirements of the European Directive 2014/68/EU.

Our Quality Control Laboratory, fully and modernly equipped, managed by highly qualified personnel is able to perform the main analyses, mechanical tests and dimensional checks, to guarantee the high quality of our products. products. On request we can perform 100% NDE non-destructive tests, including visual checks and PMI internally, while for LP penetrating liquids, UT ultrasound, ET induced currents and MT magnetoscopy we use external laboratories (Certificates UNI CEI EN ISO/IEC 17025)

We are therefore able to certify the lots supplied with documents issued according to EN 10204 (2.1, 2.2 and 3.1), or with the intervention of “Third Party” Bodies to provide the certificate EN 10204.3.2.

---