Description
We are professional Forging Steel valve bonnets, forging steel ball valve bonnets, forged steel globle valve bonnets, forged steel check valve bonnets, forged steel gate valve bonnets manucturer from china
Following is material grade that normally used in forged steel valve bonnets
ASTM A105、Sa350 LF2ASTM A694-F50/F55/F60/F70,Sa350 LF6,A182-F6a,AISI 410SS,A182-F6NM,4140, 4130,AISI 8620,AISI 8630,A182-F91,A182-F92,A182-F11,A182-F22.A182-F12,A182-F304,A182-F316,A182-F317,A182-F347,A182-F304L,F316LA182-F321,A182-F316LN, A182-316N, AISI 317LMN, AISI 317LN,AISI 316Ti
ASTM A182-F44,ASTM A182-F60,ASTM A182-F61,ASTM A182-F51、ASTM A182-F53、A286,ASTM A182-F55,17-4ph,Xm-19,Nitronic 50,Nitronic 60,,Alloy 20,Sanicro 28, UNS N08028, 904L,15-5ph,17-7ph,Ph15-7 Mo,254Smo,Al-6Xn,654SMO,,UNS N08028.UNS N08367,UNS S31254 UNS S32750.UNS S32550,UNS S32760UNS S31803
Inconel 718, Inconel 625,,Inconel 600,inconel 601,inconel 725,inconel X-750
Incoloy 825,incoloy 800/800H/800HT,Incoloy 925,Incoloy 926
Monel 400/K500,
Hastelloy C276,Hastelloy C22,Hastelloy C-4,Hastelloy B-2,,Hastelloy B-4, Hastelloy G30, Hastelloy G50
FOllowing is melting methods of Forging steel valve bonnets
Material supplied to meet this specification shall be melted by one of the following sequence of processes:
Step 1: Basic electric furnace (EF)
a) Step 2: Argon oxygen decarburization (AOD) or vacuum oxygen decarburization (VOD)
b) Step 3: Vacuum arc remelting (VAR)
c) Step 4: Additional VAR
Step 1: Vacuum induction melting (VIM)
a) Step 2: Vacuum arc remelting (VAR)
8.4. Step 1: Vacuum induction melting (VIM)
a) Step 2: Eletroslag remelting (ESR)
We also provide surface treatment supply capabilities include ENP, chrome plating,tungsten carbide, inconel,monel,stainless steel cladding to meet customers' high-strength,corrosion-resistant, anti-corrosion and other industrial and mining requirements
FOllowing is production and inspection standard of forged valve bonnet
ASTM A370 (Standard Test Methods and Definitions for Mechanical Testing of Steel Products)
ASTM A751 (Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel
Products)
ASTM E112 (Standard Test Methods for Determining Average Grain Size)
ASTM A668 (Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use)
API 8A (Specification for Drilling and Production Hoisting Equipment)
API 8C (Specification for Drilling and Production Hoisting Equipment, PSL1 and PSL2)
NDE REQUIRMENT of all our finished forged valve bonnet is s as folowings
The acceptance criteria and inspection procedures of visual inspection, UT shall be as per API 6A, ASTM A388/388M and other relevant standards.
Ultrasonic Testing (UT) of forged valve bonnet :
. Ultrasonic Inspection is required for all forgings after heat treatment for mechanical Properties exclusive of stress relief treatments or re-tempering to reduce hardness.
. UT examination methods shall be in accordance with ASTM A388/388M, ASTM E127 (ASTM E428) or ASTM E2375.
Calibration: The distance amplitude curve (DAC) shall be based on a maximum 1.6 mm (1/16
in.) flat-bottom hole (straight-beam technique) for metal thicknesses through 38.1 mm (1.1/2 in.), on a maximum 3.2 mm (1/8 in.) flat-bottom hole for metal thicknesses from 38.1 mm (1.1/2 in.)
through 152.4 mm (6 in.), and on a maximum 6.4 mm (1/4 in.) flat-bottom hole for metal thicknesses exceeding 152.4 mm (6 in.).
We could supply forged , heat treatment, rough machined, your side final machined in your place
ALl our finished forging steel valve bonnet should be accepted by the QC department of the manufacturer by conducting the following
examinations:
1) external examination;
2) a check of dimensions and marking;
3) chemical composition examination;
4) mechanical tests;
5) macrostructure examination;
6) residual stress measurement;
7) ultrasonic testing;
8) periscopic testing.
