full threaded stud bolts
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Full Threaded Stud Bolts

We are the Roll-Fast leading manufacturers of Full thread stud bolt for the construction of Petrochemical Industries & general maintenance work on a daily basis. We offer full thread stud bolts in different grades like 8.8, 10.9, 12.9, B7, B8, L7, B16 etc. & we offer sizes from M10 to M100 or 1/2” to 4”.

What are Full threaded stud bolts?

Full threaded stud bolts are non headed bolts, these are in form of a rod and have threads from end to end. These stud bolts are generally provided with double nuts and often with 4 nuts depending upon the application and requirements of the project or customer. Additionally washers can also be provided along with these stud bolts. These stud bolts are manufactured by us in Alloy Steel, carbon steel, stainless steel & Duplex Steel. Popular carbon steel grades include A 193 and A 320. Grades include 8.8, 10.9, B7, B7M, L7, L7M, B8, B8M Class 1 and Class 2. The requirements for these are mentioned in the American standard A 193 and A 320.

Roll-fast manufactures world class Full thread stud bolts for use in petrochemical industry, these Stud bolts are manufactured as per Indian, European and American standard in Coating like Plain, Black and Hot Dip Galvanised(HDG), Geomat, Zinc Flake, Zinc Electroplating, Xylon, PTFE, Non-Metallic coating etc. .

Stud bolts are used extensively in petrochemical projects for flange joints in high temperature pipelines and also on rigs and offshore platforms in various parts of the world. Some of the major grades and sizes manufactured are given below-

Grade

Diameter

Type

Application area

ASTM A 193 Gr. B-7, B16, L7, L7M

1/2" to 4"

M10 to M100

Ferratic steel

high temperature piping, flange joints, rigs and offshore platforms

8.8, 10.9, 12.9

1/2" to 4"

M10 to M100

Ferratic steel

high temperature piping, flange joints, rigs and offshore platforms

SS 316 / AISI 316

1/2" to 4"

M10 to M100

Ferratic steel

high temperature piping, flange joints, rigs and offshore platforms

SS 316 L / AISI 316 L

1/2" to 4"

M10 to M100

Ferratic steel

high temperature piping, flange joints, rigs and offshore platforms

316S311

1/2" to 4"

M10 to M100

Ferratic steel

For low temperature piping, flange joints and platforms

Petrochemicals are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane.

High temperature pipelines or cross country pipelines which are transporting fuel and crude oil often use alloy steel grade B-7, B-7M grade stud bolts for flange joints. We are exporting petrochemical grade stud bolts to over 60 countries all over the world.

Manufacturing

These stud bolts are first cut as per customer requirement and then the ends are chamfered to specs at 45 degrees, We then do heat treatment on them in our factory using an advanced SQF sealed quench heat treatment furnace from DOWA Japan, the heat treatment furnace is SCADA controlled and provides 100% repeatability batch after batch. The heat treatment result is a perfect marten site after hardening and gives perfect results after tempering as per standard requirement. After heat treatment we complete the thread rolling and then coating as per customer requirement and then final assembly.

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